A hashtag is a keyword or phrase preceded by the hash symbol (#), used on social media and online platforms to identify, categorize, and facilitate the search of specific topics or themes. It is most commonly used on platforms like Twitter, Instagram, and Facebook. By clicking on a specific hashtag, users are led to all the public and recent posts that also use that hashtag.


The phonetic pronunciation of the word “Hashtag” is: /ˈhæʃtæɡ/

Key Takeaways

<ol><li>Hashtags are an important tool for social media platforms. They are used to categorize content, making it easier for users to find specific topics or themes they are interested in.</li><li>Utilizing hashtags effectively can greatly enhance the visibility of your post. It functions as a keyword that makes content discoverable to people who might be interested in what you’re posting.</li><li>Despite its benefits, it’s crucial not to overuse hashtags. Using too many hashtags in a single post can make it look spammy and unappealing, negatively affecting user engagement.</li></ol>


The technology term hashtag is important because it fundamentally revolutionizes the way information is categorized, searched, and shared on social media platforms. Hashtags, represented by the symbol ‘#’, are used to tag keywords or topics in a message or post. They act as a powerful tool for users to engage in specific conversations, track trending topics, or connect with broader communities that share similar interests. Beyond this, hashtags also provide companies a means of promoting their products or services, enhancing their visibility, and analyzing customer responses and preferences. Therefore, hashtags play a vital role in social media use, contributing significantly to the navigation, organization, promotion, and interaction aspects of digital communication.


Hashtags are vital tools in the realm of social media that serve purposes from simple categorization to connecting trends and ideas across platforms. Primarily, they function as a sort of ‘tag’ or a label for content which makes it easier for users to find posts that share a common theme or subject matter. When users click on a hashtagged word or phrase, they are led to a page that aggregates all posts that are also tagged with the same term. This helps individuals to discover content and accounts based on their interests, and enables them to participate in broader discussions organically through the use of shared hashtags.Moreover, hashtags can play a significant role in driving social media campaigns or movements, as they can be used to rally around particular themes or causes. For instance, marketers often leverage them to increase the visibility of their content, thus helping to expand their reach and cultivate a sense of community among their followers. Social movements or awareness campaigns also frequently adopt hashtags to unify their messages and amplify their reach globally. In essence, hashtags serve as a digital tool to sort and connect information on social media, facilitating discovery, engagement, and collaboration among online users.


1. Event Discussion: One of the most common uses of hashtags is for discussions around events. For instance, during the Oscars every year, many people use the #Oscars hashtag on platforms like Twitter to discuss the show, nominees, winners, and more. It makes it easy for anyone interested to follow the conversation and also participate in it.2. Social Movements: Hashtags are often used to spread awareness about various social issues. For instance, the #BlackLivesMatter hashtag became a tool for the global discussion about racial injustice. Similarly, #MeToo was used for sharing stories of sexual harassment and assault.3. Marketing and Promotions: Brands often use hashtags as a marketing tool for their products or services. For example, Coca-Cola once started a campaign using the hashtag #ShareACoke, encouraging consumers to share photos of themselves enjoying a Coke. This type of hashtag usage allows companies to engage their audience while also promoting their product.

Frequently Asked Questions(FAQ)

**Q: What is a hashtag?** A: A hashtag is a keyword or phrase preceded by the “#” sign used on social media platforms to index or categorize content. This makes the content easier to find when users search for a particular topic or interest. **Q: Where can I use hashtags?**A: Hashtags can be used on various social media platforms such as Twitter, Instagram, Facebook, LinkedIn, YouTube and more. **Q: How does a hashtag work?**A: When you add a hashtag to your post, it will become clickable and searchable. If you click on a hashtag, it will take you to a page that aggregates all posts with the same hashtag. **Q: Does the use of capitalization matter in hashtags?**A: No, capitalization does not affect a hashtag. For example, #ExampleTag and #exampletag will lead to the same search results page. **Q: Can I create my own hashtag?**A: Yes, you can create your own hashtags. They can be a powerful tool to aggregate your own content, generate buzz for a campaign, or start a movement. **Q: Should I use more hashtags to reach more people?**A: Not necessarily. It is usually recommended to use relevant and targeted hashtags. Overloading a post with hashtags, also known as “hashtag stuffing”, can make your post seem spammy and unprofessional. **Q: Do hashtags only work with words?**A: No, numbers can also be included in a hashtag. However, spaces and special characters (such as $, %, etc.) are not supported. **Q: What is a trending hashtag?**A: A trending hashtag is a topic or phrase that is popular on social media at a given time. You can often see a list of trending hashtags on your social media platforms.

Related Tech Terms

  • Trending
  • Social Media
  • User-generated content
  • Digital Marketing
  • Microblogging

Sources for More Information


About The Authors

The DevX Technology Glossary is reviewed by technology experts and writers from our community. Terms and definitions continue to go under updates to stay relevant and up-to-date. These experts help us maintain the almost 10,000+ technology terms on DevX. Our reviewers have a strong technical background in software development, engineering, and startup businesses. They are experts with real-world experience working in the tech industry and academia.

See our full expert review panel.

These experts include:


About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

More Technology Terms

Technology Glossary

Table of Contents