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What is a Hashtag? A Simple Explanation You’ll Love [2025 Guide] 

YouTube Analytics
Mamta January 23, 2025 14 min read

Did you know hashtags were once termed as “too nerdy” by the Twitter founder?  

Well, safe to say, that notion didn’t hold and today we see hashtags being used unsparingly on social media. But here’s the thing: not everyone uses them the right way. 

Mostly, we see people throwing in random hashtags, hoping for magic, but that’s not how they work.  

In this guide, we’ll uncover what is a hashtag, how they work, and how to use them effectively to make your content stand out. Let’s dive right in!  

What is a Hashtag?  

Hashtags are everywhere on social media, from Instagram captions to trending Twitter topics. But in exact terms–what is a hashtag? 

Think of hashtags as your shortcuts to relevant content. Whether you’re a brand, influencer, or casual user, hashtags can help connect you with a larger audience interested in similar topics. 

Definition of a Hashtag 

A hashtag is a keyword or phrase that comes right after by the “#” symbol. Hashtags are mostly used across social media platforms to categorize content and make it discoverable.  

In simpler terms, you can consider hashtags to be labels that lets you search and engage with content about a specific interest. 

What is a Hashtag Actually Called? 

The official name for the “#” symbol is the “octothorpe,” but in the social media slang, it’s commonly called a “hashtag.” Initially, the “#” symbol was used in coding and telecommunication. 

When Chris Messina introduced the idea of using hashtags on Twitter in 2007, he referred to them as “channel tags.” Over time, the term “hashtag” became the universal name for this content-labeling tool, blending the “#” symbol with its tagging functionality. 

Today, hashtags have evolved into essential tools for organizing, discovering, and participating in social media trends

What Does a Hashtag Mean or Do? 

Hashtags make it easier to find posts about the same topic on social media. We’ve already established that. But what exactly happens when you add a “#” to your post? 

Content Organization 

When you include a hashtag like #TravelTips in your post, social media platforms automatically categorize it with all other posts using the same tag.  

In terms of fancy metaphors–It’s like adding your book to the right shelf in a vast digital library, making it easy for interested readers to find it. 

Smart Content Discovery 

Social platforms use hashtags to connect your content with interested audiences.  

For instance, a food blogger using #HomeCooking reaches not just their followers, but anyone exploring that topic.  

It’s like having a virtual billboard that appears exactly where your target audience is looking. 

Trend Participation 

Popular hashtags like #WorldCup or #OscarNight act as virtual gathering spaces. Using them appropriately lets you join these global conversations when they’re happening. 

However, relevance is key – using #FootballFever on a cooking post won’t help your content reach the right audience. 

But remember: A well-chosen hashtag connects your content with interested viewers, while irrelevant or vague tags (like #Nice or #Cool) simply fade into the digital noise. 


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📈 Increase Likes, Shares, and Followers with the Right Hashtags


Why Do People Use Hashtags on Social Media? 

Hashtags play a big role in helping your content get noticed on social media. They make it easier for people to find your posts and connect with them.  

Let’s break down why hashtags matter and how you can use them effectively. 

Enhancing Content Visibility 

Hashtags group similar posts together, increasing the chances of your content showing up in searches or trending topics. They help you reach people who might not follow you but are interested in the same topics. 

Boosting User Engagement 

Using the right hashtags can spark more likes, comments, and shares. They put your content in front of users who are ready to engage with it. 

Tracking Trends and Insights 

Hashtags let you join trending conversations and see what’s popular. They also help you track how well your posts are performing in those conversations. 

How Do Hashtags Work on Different Social Media Platforms?  

Hashtags may look the same across platforms, but the way they’re used and their impact can vary widely.  

Let’s dive into how hashtags work, so you can make the most of them on each platform. 

Facebook 

Hashtags on Facebook don’t carry the same weight as they do on other platforms, but they still serve a purpose.  

When you add hashtags to a post, it becomes part of a clickable category. Users can click or search for hashtags to find related content. 

Best Practices: 

  • Use 1–2 hashtags per post. 
  • Focus on specific or branded hashtags to reach a niche audience. 
  • Avoid overloading posts with hashtags, as it can feel out of place on Facebook. 

Instagram 

Instagram is where hashtags truly shine. They’re key to increasing visibility and engagement.  

Hashtags on Instagram help categorize your content, making it discoverable on the Explore page or through hashtag searches. 

Best Practices: 

  • Use a mix of popular, niche, and branded hashtags (10–15 is ideal). 
  • Add hashtags in the caption or the first comment for a cleaner look. 
  • Experiment with hashtag strategies using Instagram Insights to see what works. 

Get our list of trending Instagram Reels hashtags here!  

YouTube 

On YouTube, hashtags are used in video titles, descriptions, and above the video title as clickable links.  

They help users find videos on specific topics and trends. 

Best Practices: 

  • Include 1–3 relevant hashtags in your video title or description. 
  • Avoid irrelevant or misleading hashtags, as YouTube may penalize the video. 
  • Use trending hashtags to tap into current conversations, especially for tutorials or vlogs. 

If you’re actively creating content on YouTube, check out these best hashtags for YouTube Shorts to get started.  

LinkedIn 

Hashtags on LinkedIn help your posts appear in searches and connect with professionals who follow specific topics. They’re great for boosting reach within professional networks. 

Best Practices: 

  • Use 3–5 hashtags that align with your industry or content. 
  • Combine broad hashtags like #Marketing with niche ones like #SocialMediaTips. 
  • Check trending hashtags within LinkedIn to join relevant conversations. 

For LinkedIn hashtags, check out our list of LinkedIn Hashtags for More Visibility. 

Pinterest 

On Pinterest, hashtags work as keywords. They help categorize your pins and make them easier to find in searches. However, the focus is more on long-term discoverability than instant trends. 

Best Practices: 

  • Use 3–5 hashtags per pin. 
  • Stick to descriptive hashtags that match the pin’s content, like #DIYProjects or #HomeDecorIdeas. 
  • Avoid trendy hashtags, as Pinterest content has a longer shelf life. 

Best Practices for Using Hashtags in Digital Marketing 

Hashtags are powerful tools in digital marketing but using them effectively requires a strategy. Here are some hashtag best practices to keep in mind: 

  • Keep Hashtags Relevant: Make sure your hashtags match the content of your post. Irrelevant hashtags may confuse your audience and hurt engagement. For example, if you’re posting about fitness, a hashtag like #WorkoutMotivation works better than #Foodie. 
  • Mind the Length: Short and easy-to-read hashtags perform better. Long hashtags like #TheBestDigitalMarketingTipsEver can be hard to read and remember. Instead, go for something concise like #MarketingTips. 
  • Use the Right Quantity: Overloading your posts with hashtags can make them look cluttered. Aim for 1–3 hashtags on platforms like LinkedIn or Facebook and 10–15 on Instagram for better results. 
  • Mix It Up: Combine popular hashtags, niche-specific tags, and branded hashtags. Popular tags help you reach a larger audience, while niche hashtags connect with a targeted group. 
  • Stay Updated: Trends change fast. Keep an eye on trending hashtags in your industry and use them when relevant. 

Hashtag Goals: How to Set and Achieve Them? 

Setting clear hashtag goals helps you get the most out of your efforts. Here’s how you can do it: 

Start By Defining Your Goals 

Are you looking to increase brand visibility, improve engagement, or join a trending conversation? Clear goals guide your strategy. For instance, a fitness brand might aim to trend with #Fitspiration or drive engagement with #30DayChallenge. 

Regularly Track Metrics 

Measure hashtag performance using analytics tools. Look at impressions, reach, and engagement rates to understand what’s working. For example, Instagram Insights can show how many people found your post through a specific hashtag. 

Test and Adapt Accordingly 

Not every hashtag will perform well. Experiment with different combinations and analyze results. If a hashtag isn’t helping you achieve your goals, tweak your strategy. 

Engage with Your Audience  

Use hashtags to join conversations, not just to promote. Reply to comments, participate in trending topics, and use community-driven hashtags to build stronger connections. 

All About Hashtags: The Do’s and Don’ts 

When it comes to hashtags, a few mistakes are enough to spoil your social media strategy.  

Here’s a quick guide to the do’s and don’ts: 

The Do’s 

  • Do Research: Always check the meaning and popularity of a hashtag before using it. Some hashtags may have unintended or controversial associations. 
  • Do Keep It Simple: Simple, easy-to-read hashtags are more likely to be remembered and searched. 
  • Do Use Branded Hashtags: Create a unique hashtag for your business to encourage user-generated content and track mentions. For example, Coca-Cola’s #ShareACoke became a global trend. 

The Don’ts 

  • Don’t Use Too Many Hashtags: Overstuffing your post with hashtags looks spammy and can hurt engagement. Quality matters more than quantity. 
  • Don’t Hijack Trending Hashtags: Using a trending hashtag unrelated to your content can backfire and harm your credibility. 
  • Don’t Ignore Analytics: Skipping analytics means missing out on valuable insights. Always track and adjust your hashtag strategy based on performance. 

By following these guidelines, you can turn hashtags into powerful tools for boosting your digital marketing success. 

👉 RELATED: Read our step-by-step guide on hashtag analytics

How to Analyze Hashtag Performance with Vaizle?  

In the last section, we talked about analytics when it comes to hashtag best practices. Now, let’s see how Vaizle simplifies this task for you.  

Vaizle’s trend analysis is meant specifically to track hashtag performance, both for your own or competitor’s brands.  

For example: let’s say you want to find the top hashtags used by your competitor. In this case, let’s consider Hulu.  

Here are the steps to follow:  

Step 1: Log in to your Vaizle account and head to “Trend Analysis” section under “Competitive SM Analysis.”  

Trend Analysis in Vaizle

Step 2: Now select the brand. In case you haven’t added it to your brand landscape, click on the ‘Add Brand’ button. Here’s how you can proceed with that.  

How to select and add a brand in Vaizle trend analysis?

Step 3: Click on the search tab to enter hashtags. Vaizle will also automatically pick the trending tags used by the selected brand.  

How to select hashtags in Vaizle trend analysis?

That’s it! Vaizle will now give you a detailed report highlighting these factors:  

  • Hashtag usage divided between Facebook and Instagram 
  • Daily average usage of the hashtag  
  • Brand’s hashtag engagement trend  
Vaizle trend analysis to measure hashtag performance.

To get started, start your 7-day trial now!  

Conclusion  

So there you have it – the complete story of how a simple “#” symbol changed the way we connect online! Whether you’re sharing travel photos on Instagram, building your professional network on LinkedIn, or joining conversations on Twitter, hashtags help you get noticed in the busy world of social media. 

Remember, using hashtags isn’t about throwing as many as possible into your posts. It’s about making genuine connections with people who care about the same things you do. Start small, experiment with different tags, and most importantly – have fun with it! After all, that’s what social media is all about. 

Ready to put your hashtag knowledge to work? Jump in and try out some of the strategies we’ve covered. You might be surprised at how a simple # can open up a whole new world of connections! 

Frequently Asked Questions

1. Can I use spaces or special characters in hashtags?

No, you cannot use spaces or special characters in hashtags. Hashtags need to be written as one continuous word without spaces or special characters. Instead of #New York City, use #NewYorkCity or #NYC. The only symbol that works in a hashtag is the underscore (_). 

2. How many hashtags should I use in one post?

It depends on the platform! On Instagram, you can use up to 30, but 10-15 is the sweet spot. For Twitter and LinkedIn, stick to 1-3 hashtags. On Facebook, less is more – 1-2 hashtags work best. 

3. Should I create my own hashtag for my brand or event?

Creating a branded hashtag can be great for building community and tracking engagement! Just make sure it’s: 

  • Easy to spell and remember 
  • Not already being used by someone else 
  • Specific to your brand or campaign 
  • Short enough to be practical 

4. Do capital letters matter in hashtags?

While hashtags work the same whether they’re uppercase or lowercase, using capital letters can make them easier to read. Compare #digitalmarketing with #DigitalMarketing. The meaning is the same, but the second one is more reader-friendly! 

5. Why aren't my hashtags getting any engagement?

Low hashtag engagement usually comes down to a few common issues: 

  • Using hashtags that are too broad or competitive 
  • Using outdated or abandoned hashtags 
  • Not matching hashtags to your content 
  • Using the same hashtags repeatedly 

Try researching trending hashtags in your niche and mix up your hashtag combinations regularly. 

About the Author

Mamta

Mamta

Mamta is an SEO Analyst with 2 years of experience. Currently, she is spending her time on content roadmapping to drive organic growth and engagement for SaaS businesses. Mamta is also an avid cinephile who spends her spare time watching latest action and sci-fi flicks from around the world.

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