Hashtag Strategy for Ecommerce Brands
How Hashtags Work on Each Platform
Hashtags function differently across platforms, and a strategy that works on Instagram will not necessarily work on TikTok or Pinterest. Understanding each platform's hashtag mechanics lets you optimize for each one rather than using a one-size-fits-all approach.
Instagram allows up to 30 hashtags per post, but research consistently shows that 8 to 15 well-chosen hashtags outperform 30 random ones. Instagram uses hashtags to understand what your content is about and which users might find it relevant. When you use relevant hashtags, your content appears on the hashtag's page and may appear in the Explore feed for users who follow or interact with similar hashtags. Instagram's algorithm also uses your hashtag history to classify your account, so using consistent, niche-relevant hashtags over time trains the algorithm to show your content to the right audience.
TikTok uses hashtags primarily as a discovery signal alongside the video's visual content, audio, captions, and engagement patterns. TikTok hashtags are less critical to distribution than on Instagram because TikTok's recommendation algorithm relies more heavily on content signals than on hashtag categorization. Use 3 to 5 highly relevant hashtags on TikTok, including a mix of broad niche hashtags (#skincaretips) and specific product hashtags (#vitaminCserum). Trending hashtags and challenge hashtags can boost distribution when your content genuinely relates to the trend.
Pinterest does not use hashtags in the traditional sense. While you can include hashtags in pin descriptions, Pinterest's search algorithm weights keywords in your pin title, description, and board names far more than hashtag usage. Focus your Pinterest optimization on natural keyword inclusion in descriptions rather than hashtag strategies. Our Pinterest marketing guide covers keyword optimization in detail.
Facebook hashtags have minimal impact on organic reach. Facebook's algorithm prioritizes engagement signals and personal connections over hashtag categorization. Using 1 to 3 relevant hashtags on Facebook can help with searchability but will not significantly increase post distribution. Do not invest significant effort in Facebook hashtag strategy.
Building Your Hashtag Library
Open Instagram's search and type keywords related to your products. Note every relevant hashtag that appears in the suggestions and their post counts. Visit the profiles of 5 to 10 successful competitors or brands in your niche and record the hashtags they use consistently. Search for content from micro-influencers in your space and note their hashtag selections. On each hashtag page, check the "Related" section for additional relevant tags you may have missed. This research typically yields 80 to 150 potential hashtags.
Sort your researched hashtags into three tiers based on post volume. Large tier: 500K to 5M posts, these give you a chance at broad discovery but are highly competitive. Medium tier: 50K to 500K posts, these offer a realistic chance of appearing in the top posts section and reaching a targeted audience. Niche tier: 5K to 50K posts, these have the lowest competition and the most targeted audience, giving you the best chance of sustained visibility. Avoid hashtags with over 10M posts (#love, #fashion, #instagood) because your content gets buried within seconds.
Build 4 to 6 different hashtag sets that you rotate between posts, each containing 8 to 15 hashtags. Create sets aligned with your content categories: one set for product posts, one for educational content, one for behind-the-scenes content, one for customer features, and so on. Each set should contain 2 to 3 large tier tags, 4 to 6 medium tier tags, and 3 to 5 niche tier tags. Rotating sets prevents Instagram from flagging your account for repetitive hashtag behavior and tests which combinations drive the best results.
Choose a unique hashtag specific to your brand that customers can use when posting about your products. Effective branded hashtags are short, memorable, easy to spell, and clearly associated with your brand. Check that the hashtag is not already in wide use by searching it on Instagram and TikTok. Promote your branded hashtag on packaging inserts, post-purchase emails, your website, and in your social media bios. A branded hashtag creates a searchable collection of all customer content related to your brand and serves as a simple way for customers to tag you in posts.
Hashtag Best Practices for Ecommerce
Relevance over popularity. Every hashtag should describe your content accurately. Using popular but irrelevant hashtags (#motivation on a product photo) attracts the wrong audience, tanks your engagement rate, and confuses the algorithm about what your content is about. A leather goods store should use #leathercraft, #handmadeleather, and #leatherbag rather than #fashion, #style, and #ootd. The niche hashtags reach fewer total people but reach a much higher percentage of potential customers.
Include product-specific and category hashtags. Mix hashtags at different levels of specificity. Broad category: #homedecor. Subcategory: #modernhomedecor. Product type: #ceramicvases. Specific product: #handmadeceramicvase. This layered approach captures searchers at every level of specificity, from general browsers to people searching for exactly what you sell.
Use location hashtags when relevant. If your products have geographic appeal (made locally, shipped regionally, or relevant to a specific area), include location hashtags. #MadeInBrooklyn, #TexasSmallBusiness, or #LondonArtisan connect you with customers who value local or regional products. Location hashtags are also less competitive than product hashtags, giving your content better visibility.
Place hashtags in the caption, not comments. Instagram's algorithm reads hashtags in both locations, but placing them in the caption ensures they are indexed immediately when the post goes live. If you prefer a cleaner caption appearance, put hashtags after a few line breaks at the bottom of the caption. On Reels, you can include hashtags in both the caption and as on-screen text for additional algorithmic signals.
Tracking Hashtag Performance
Instagram Insights shows you how many impressions each post received from hashtags specifically. Check this metric on your recent posts to see which hashtag combinations drive the most hashtag-sourced impressions. Posts where hashtag impressions represent 20% or more of total impressions indicate strong hashtag performance. Posts with less than 5% of impressions from hashtags suggest your hashtag selection needs improvement for that content type.
Monthly, review your hashtag library and remove tags that consistently underperform. Search each hashtag on Instagram to verify it has not been flagged or restricted by the platform (some hashtags get restricted due to spam or policy violations, and using restricted hashtags can suppress your post's reach). Add new hashtags you discover through competitor research or audience exploration. A healthy hashtag library evolves over time as you learn which tags connect your content to the right audience.