You’ve seen them everywhere, on Instagram posts, LinkedIn articles, X (formerly Twitter) threads, and even YouTube descriptions. But beyond being a familiar symbol, hashtags are one of the most underutilised tools in a brand’s social media toolkit. When used correctly, they can dramatically expand your reach, attract the right audience, and put your content in front of people who are actively searching for what you offer.
At Yugen Consulting, we work with brands to make every element of their social media strategy intentional, and that includes getting hashtags right.
What Is a Hashtag in Social Media?
Let’s start from the beginning: what is a hashtag in social media?
A hashtag is a word or phrase preceded by the “#” symbol (for example, #DigitalMarketing or #SmallBusinessTips). When you click or search a hashtag on any platform, you’re taken to a feed of all public posts using that same tag. This is how hashtags work, they categorise content and make it discoverable to anyone interested in that topic, not just your existing followers.
The concept was first introduced on Twitter in 2007 and has since become a universal feature across Instagram, LinkedIn, Facebook, TikTok, and more. Understanding what is a hashtag in social media is the first step to using one strategically rather than decoratively.
Why Hashtags Still Matter in 2025
Some marketers wonder if hashtags have lost their edge. The short answer is no, but their role has evolved. Hashtags are no longer just about going viral. Today, they’re a precision tool for reaching niche communities, building brand awareness, and joining conversations that matter to your audience.
Here’s what the right hashtag strategy can do for your brand:
Increase Organic Reach: Hashtags extend your content beyond your follower base, exposing it to users who follow or search those topics.
Build Community: Branded hashtags create a space where your customers, partners, and fans can gather and contribute content around your brand.
Improve Discoverability: On platforms like Instagram and LinkedIn, posts with relevant hashtags consistently outperform those without them in search and explore features.
Join Trending Conversations: Tapping into trending topics with the right tag keeps your brand timely and visible.
How to Use Hashtags Effectively on Every Platform
Knowing how to use hashtags varies depending on the platform. Here’s a breakdown:
Instagram: Instagram allows up to 30 hashtags per post, but research suggests 5–10 highly relevant hashtags tend to perform better than a wall of tags. Mix popular hashtags with niche ones to balance reach and targeting. Place them at the end of your caption or in the first comment.
LinkedIn: One to three focused hashtags per post is the sweet spot here. LinkedIn’s algorithm favours quality over quantity, so choose hashtags that reflect your industry and the specific topic of your post.
X (Twitter): One or two hashtags per tweet are ideal. Overloading a tweet with tags actually reduces engagement. Focus on trending or relevant hashtags that tie into current conversations.
TikTok: Use a mix of broad hashtags (#MarketingTips) and niche ones (#B2BContentStrategy) to help the algorithm place your video in the right feeds.
Facebook: Hashtags are less critical here but still useful for events and branded campaigns.
At Yugen Consulting, we help clients develop platform-specific hashtag strategies so their content works harder across every channel.
Does a Hashtag Work on Instagram? Here’s the Truth
A question we hear often is: does hashtag work on Instagram as effectively as it used to? The answer is yes, but with a caveat. Instagram has shifted towards interest-based algorithms, which means relevant hashtags matter more than popular ones.
Stuffing your caption with #Love or #Instagood when you’re a B2B brand won’t move the needle. Instead, focus on hashtags that describe your specific content, target audience, and industry. Tools like Instagram’s search bar, Meta Business Suite, and third-party platforms can help you identify which tags your ideal audience actually follows.
The brands that see the best results from Instagram hashtags are those that treat them as a targeting tool, not an afterthought.
Tips for Choosing the Right Hashtags
Knowing how to use hashtags is one thing, choosing the right ones is another. Here are some practical tips:
Research before you post: Use platform search features to see the volume and content associated with a hashtag before using it.
Mix tag sizes: Combine high-volume hashtags (1M+ posts) with medium (100K–500K) and niche tags (under 50K) for the best reach-to-relevance ratio.
Create a branded hashtag: A unique tag for your brand encourages user-generated content and builds community around your name.
Audit regularly: Hashtag performance changes. Review your analytics monthly and swap out tags that aren’t driving impressions or engagement.
Yugen Consulting recommends building a master hashtag bank for your brand, organised by topic, platform, and audience segment, so your team always has a ready list of tested, relevant hashtags to draw from.
FAQs About Hashtags in Social Media
Q: What is a hashtag in social media, exactly? A hashtag is a “#” symbol followed by a keyword or phrase. It categorises your content so it appears in searches and feeds for that topic, helping you reach people beyond your existing followers.
Q: How to use hashtags for maximum reach? Use a mix of popular, niche, and branded hashtags. Limit quantity based on the platform, fewer, more targeted tags generally outperform large clusters. Always ensure your hashtags are relevant to the content you’re posting.
Q: Does hashtag work on Instagram in 2025? Yes. Relevant hashtags on Instagram still help your content surface in search results and explore pages. The key is using specific, audience-targeted tags rather than overly generic ones.
Q: How many hashtags should I use per post? It depends on the platform. Instagram: 5–10; LinkedIn: 1–3; Twitter/X: 1–2; TikTok: 3–5 mixed tags. Quality and relevance always outweigh quantity.
Q: What are relevant hashtags and how do I find them?
Relevant hashtags directly relate to your content, industry, or audience. Find them using platform search tools, competitor analysis, or social media management tools like Sprout Social or Hootsuite.