Best Hashtags for More Likes: Complete Platform-by-Platform Strategy (2025)

How Hashtags Actually Work (Platform by Platform)

Hashtags are one of the most misunderstood tools in social media marketing. Most creators treat them as a magic reach-booster to be used in maximum quantity — adding 30 random hashtags and hoping for the best. This approach is not just ineffective; it can actively hurt your reach. Understanding how hashtags actually function across different platforms is the foundation of using them strategically.

Hashtags serve two fundamentally different functions:

• Discovery: Hashtags create browsable feeds. When someone follows a hashtag or taps it in a post, they see recent and top posts tagged with that hashtag. If your content appears in a hashtag feed, you're visible to people who don't follow you but are interested in that topic.
• Categorization: Platform algorithms use hashtags as one of several signals to understand what your content is about. This categorization helps the algorithm serve your content to interested audiences through Explore pages and For You feeds — even outside of explicit hashtag searches.

How these functions apply differs by platform. On Instagram, both functions are significant — and hashtags work alongside the Instagram algorithm to place your content in front of new audiences. On TikTok, categorization matters more than discovery (few people browse hashtag feeds on TikTok) — the TikTok algorithm does most of the discovery work. On YouTube, hashtags appear above titles and contribute to search categorization but have minimal direct discovery impact. On Twitter/X, hashtag trend discovery is significant but different from the evergreen discovery Instagram offers.

How Hashtags Directly Impact Your Likes and Reach

Hashtags aren't just organizational tools — they're a direct lever on how many likes your posts earn. Here's the specific mechanism.

Hashtags expand your like pool beyond followers: When a post with no hashtags publishes, your initial audience is limited to your followers and whatever algorithmic distribution the platform grants based on your engagement history. Add well-chosen hashtags, and your post enters hashtag feeds and topic categorization systems that can place it in front of thousands of non-followers who are specifically interested in your topic. Those non-followers convert to likes at higher rates than random audiences because they're already interested in the subject matter — they followed or searched that hashtag for a reason.

Hashtags improve like quality by reaching aligned audiences: The most damaging likes-per-post scenario isn't low total likes — it's high impressions with low engagement rate, which signals audience mismatch to the algorithm. Precise, niche hashtags do the opposite: they connect your content with people who naturally resonate with it, producing strong like rates that tell the algorithm your content deserves even broader distribution. Strategic hashtag use is one of the foundational strategies for getting more likes on Instagram for exactly this reason.

Hashtag reach compounds into follower growth: Every non-follower who likes your post via a hashtag feed is a potential new subscriber or follower. A post that earns 50 likes from hashtag discovery can produce 5–10 new followers — people who will like, save, and share your future content. Over time, these hashtag-sourced followers become your highest-engagement audience segment because they discovered you through specific topic interest rather than passive algorithmic recommendation.

The Three-Tier Hashtag Strategy

The most consistently effective hashtag approach across Instagram and TikTok is the three-tier strategy — using a mix of hashtag sizes that covers different competitive landscapes:

Tier 1: Niche Hashtags (under 100,000 posts on Instagram; under 50K videos on TikTok)

These are your best opportunity for sustained, high-placement visibility. Small hashtag feeds have manageable competition, and a strong post can rank in the "Top Posts" section for days or weeks. While the audience is smaller, they're intensely targeted — exactly the people who care most about your specific topic.

Example: #sourdoughstarter instead of #bread. Or #remoteworkeurope instead of #remotework.

Tier 2: Mid-size Hashtags (100,000–1M posts on Instagram; 50K–500K videos on TikTok)

These are your workhorses — significant audience size with manageable competition. Your content can rank temporarily in top posts and get meaningful discovery traffic. This tier is where most of your hashtag engagement comes from.

Tier 3: Large Hashtags (1M+ posts on Instagram; 500K+ videos on TikTok)

Use 1–2 of these primarily for algorithmic categorization signals. Your content won't sustain visibility in large hashtag feeds (it gets buried within minutes), but the categorization signal helps the algorithm understand the broad category of your content, which influences Explore/FYP distribution.

Recommended split: 3–5 niche hashtags, 3–5 mid-size hashtags, 1–2 large hashtags = 7–12 total hashtags on Instagram. On TikTok: 2–3 niche, 1–2 mid-size, 1 large = 4–6 total.

Best Hashtag Practices for Instagram

Instagram's hashtag algorithm has evolved significantly. The platform has explicitly recommended using 3–5 hashtags rather than 30, signaling that quality and relevance now matter far more than quantity. Here's the current best practice framework:

• Use 5–10 highly relevant hashtags: Every hashtag you use should accurately describe your content and connect with an audience that would genuinely enjoy what you've posted. Relevance to your specific content outweighs any other hashtag selection criteria.
• Research niche-specific hashtags: Search your topic in Instagram and study what top-performing creators in your niche use. Build a curated list of 50–100 pre-researched hashtags organized by topic.
• Create 3–5 hashtag sets: Group your researched hashtags into sets by subtopic. Rotate between sets to avoid spam detection while naturally A/B testing which set drives most reach.
• Post hashtags immediately: Place hashtags in your caption or post them as the first comment immediately after publishing. Delayed hashtags are less effective for initial algorithmic categorization.
• Avoid repetitive use of identical sets: Using identical hashtags on every post is one of the clearest spam patterns Instagram looks for. Rotation prevents this signal while keeping your content properly categorized.

Best practices for hashtag research on Instagram: Type your topic keyword in the search bar and select "Tags." Sort by relevance and browse results. For each potential hashtag, check whether the top 9 posts feature content similar to yours — if yes, it's well-categorized; if the top posts are unrelated, skip it. Aim to find at least 20 validated niche hashtags in each of your content categories.

Best Hashtag Practices for TikTok

TikTok's algorithm is more sophisticated at content categorization than Instagram's — it uses audio, visual content analysis, and viewer behavior data to understand what your video is about, making hashtags somewhat less critical than they are on Instagram. However, they still serve meaningful categorization roles. For broader TikTok content strategy, our guide to going viral on TikTok covers how hashtags fit into the complete FYP optimization strategy.

• Use 3–5 specific, topic-relevant hashtags: Quality over quantity is even more important on TikTok than Instagram. A single highly relevant hashtag provides more categorization value than 10 vaguely related ones.
• Skip #fyp, #viral, #foryoupage: These are massively overused with no demonstrable algorithmic benefit. TikTok has explicitly stated these don't give videos priority on the FYP.
• Use trending hashtags when genuinely relevant: Check TikTok's trending hashtags list in the Discover tab. If a trending hashtag genuinely relates to your content, include it — it can expose your content to the existing audience browsing that trend.
• Include your niche hashtag consistently: Always include the most specific hashtag for your content category (e.g., #skincareroutine, #gamedev, #homecooking). This trains TikTok's categorization model over time and helps your content find its intended audience.
• Keep hashtags out of spoken content: Unlike Instagram captions, TikTok hashtags in the caption are below the fold — don't waste your caption's limited visible space on hashtags. Place them after your caption text.

YouTube Hashtags

YouTube hashtags have a different role than on Instagram or TikTok. They appear as clickable links above your video title and can help viewers find related content. However, their algorithmic influence is limited compared to proper title and description optimization.

YouTube hashtag best practices:

• Use 3–5 hashtags maximum — YouTube may remove hashtags and apply a penalty if you use more than 15
• Include your primary keyword as a hashtag (e.g., #digitalmarketing, #veganrecipes)
• Include your channel name or brand as a hashtag to build a searchable content library
• Use specific, relevant hashtags rather than generic ones — YouTube indexes hashtags for search
• Place hashtags in the description rather than the title — hashtag title stuffing looks spammy and may reduce CTR

Twitter/X and LinkedIn Hashtags

Twitter/X: Hashtag use on Twitter is most valuable for trending topics and real-time events. Tweeting with a trending hashtag during a live event or cultural moment can dramatically boost visibility. For regular (non-trending) content, 1–2 specific hashtags is appropriate — excessive hashtag use looks spammy on Twitter and may reduce engagement from regular followers. Twitter's algorithm prioritizes engagement signals over hashtag categorization.

LinkedIn: Use 3–5 specific, professional hashtags on LinkedIn posts. LinkedIn's hashtag system works more like a subscription model — users follow hashtags and see posts with those hashtags in their feeds. Building a consistent presence in relevant professional hashtags (like #marketingstrategy, #entrepreneurship, or #remotework) can grow your visibility among followers of those hashtags over time. Avoid generic hashtags like #business that have millions of followers — the competition makes them difficult to gain traction in.

How to Research and Find Good Hashtags

Strong hashtag strategy begins with thorough research. Here's a systematic approach:

1. Seed research: Identify 5–10 broad topic terms that describe your content. These are your seed keywords.
2. Platform search: Type each seed keyword into the platform's search/discover feature and browse related hashtags. Note the post counts for each option.
3. Competitor analysis: Look at the top 10 performing accounts in your niche. Check which hashtags they use consistently — especially on their highest-engagement posts.
4. Validation: For each hashtag you're considering, check whether the top posts in that hashtag feed are similar to your content. Relevance confirmation is critical.
5. Tool-assisted research: Use Flick, Display Purposes, or Later's hashtag suggestion tool for Instagram. TikTok's Creative Center shows trending hashtags with volume data. These tools also flag banned/restricted hashtags.
6. Organization: Create a hashtag library document with sets organized by topic, size tier, and performance notes. This saves time and enables systematic rotation.

Hashtags to Avoid

• Banned/restricted hashtags: These actively suppress your reach. Use tools like Flick or Preview to check each hashtag before using it.
• Irrelevant hashtags: Using popular hashtags that don't relate to your content exposes it to disinterested audiences who generate negative engagement signals (skips, "Not Interested" clicks).
• Oversaturated mega-hashtags for primary use: #love (2B+ posts on Instagram) is fine as a single large-tier categorization hashtag but useless for discovery — your content disappears in seconds.
• Hashtag stuffing: 30 hashtags that are 50% irrelevant now works against you on Instagram. Same principle applies everywhere.
• Generic calls to action as hashtags: #followforfollow, #likeforlike, and similar tags signal low-quality engagement farming and may attract ghost followers who damage your engagement rate.

How to Measure Hashtag Performance

Instagram Insights shows "From Hashtags" as a traffic source for each post, allowing you to measure which hashtag sets drive the most reach. Compare posts using different hashtag sets to identify your highest-performing combinations. Track these alongside your overall engagement rate benchmarks to understand hashtags' full contribution to your account's growth.

On TikTok, the Analytics dashboard shows traffic source breakdown (FYP, following tab, hashtags, sounds). Monitoring the "Hashtag" percentage across videos posted with different hashtag strategies reveals relative performance.

Simple A/B testing approach: alternate between two different hashtag sets across your next 10 posts. Calculate average reach from hashtags for each set. Allocate more posts to the higher-performing set while continuing to test new combinations.

Actionable Hashtag Strategies to Apply Today

Here are the highest-ROI hashtag moves you can implement on your very next post:

• Check every hashtag you currently use for banned or restricted status right now. Search each hashtag in Instagram. If you see a message like "Recent posts for this hashtag are hidden" or if recent posts don't appear, that hashtag may be restricted and is suppressing your reach. Remove any restricted hashtags from your sets immediately.
• Build three distinct hashtag sets using the three-tier strategy. For each set, include 2–3 niche hashtags (under 100K posts), 2–3 mid-size hashtags (100K–500K posts), and 1–2 broad hashtags (500K–2M posts). Name them by content type (e.g., "Set A: Tutorial content," "Set B: Lifestyle posts"). Rotate between sets to prevent spam signals and gather performance data.
• Use Instagram Insights to identify your current best-performing hashtag set. Go to any recent post → View Insights → scroll to "Impressions from Hashtags." Compare this number across posts using different hashtag sets. Allocate your next 5 posts to the set with the highest hashtag impressions — then replace your lowest-performing set with new research.
• Research 5 new niche hashtags in your specific content category today. Search for a core topic keyword in Instagram or TikTok. Browse related hashtags. Find 5 with 10,000–100,000 posts that accurately describe your specific content. Add them to a new hashtag set and test them on your next 3 posts.
• Add hashtags to your posts within the first 5 minutes of publishing. If you're currently adding hashtags in the first comment long after posting, you may be missing some of the initial algorithmic categorization window. Place hashtags in the caption at time of publishing for maximum effect on Instagram and TikTok.
• Cross-reference your most-liked posts with the hashtag sets you used on each. Open your last 20 posts sorted by likes. Note which hashtag set was used on your top-liked posts. If there's a clear pattern (a specific set appearing on most of your best-liked content), that's your most like-generative set — use it more frequently while testing improvements.

Common Hashtag Mistakes

• Using the same hashtags on every single post: This triggers spam detection signals on Instagram and prevents you from discovering which hashtag sets actually work best for your content.
• Never auditing your hashtags: Hashtag popularity and ban status changes regularly. A hashtag that worked 6 months ago may now be restricted or oversaturated. Audit your hashtag library quarterly.
• Treating hashtags as your primary growth strategy: Hashtags amplify reach for good content but cannot compensate for weak content. They're an amplification tool, not a content substitute. To boost Instagram likes specifically, see our Instagram likes guide for strategies that work alongside hashtags.
• Ignoring platform-specific norms: Using Instagram strategies on TikTok (too many hashtags, all-caps tags) or TikTok strategies on Instagram (relying on algorithmic trends instead of feed discovery) misunderstands how each platform's hashtag ecosystem works.
• Using all mega hashtags (over 5 million posts): Posting in feeds with millions of posts means your content disappears within seconds. Mega hashtags like #love or #fitness provide virtually zero sustained discovery. Use them sparingly — if at all — and prioritize niche hashtags that give you a chance to rank in "Top Posts."
• Not aligning hashtags with content topic: Using popular hashtags unrelated to your content attracts irrelevant audiences who don't engage. Worse, their "Not Interested" taps signal to the algorithm that your content doesn't match your description — suppressing future non-hashtag reach too.

Pro Tips for Hashtag Strategy

• Build topic-specific hashtag sets: If you post across 3–4 topic areas, create a dedicated hashtag set for each topic. This ensures your categorization signals are always precisely relevant to each piece of content.
• Monitor competitor hashtag additions: When top creators in your niche start using a new hashtag you haven't seen before, investigate it — they may have identified a rising niche hashtag worth adding to your library.
• Create a branded hashtag: Your own unique hashtag (e.g., #YourBrandName) builds a searchable content library and provides community UGC opportunities. Promote it in your bio and posts to build a browsable feed of your best content.
• Seasonal and event-based hashtags: Adding timely hashtags related to current events, seasons, or trending topics can boost discovery during those periods — but only when genuinely relevant to your content.

The Bottom Line

The best hashtag strategy is one that prioritizes relevance over quantity, rotates between pre-researched sets, uses the three-tier approach (niche + mid-size + large), and is measured regularly to identify what's actually driving reach. Hashtags are a meaningful piece of a complete social media growth strategy — but they work best as amplifiers of genuinely good content, not as substitutes for it. For the broader engagement picture, see our guide on how to increase social media engagement. Master the fundamentals first, then use strategic hashtags to extend your reach to the right audiences.