A hashtag is a symbol denoted by a hash or pound sign (#) used in social media to categorize and organize content. By appending hashtags to words or phrases, users can label their posts and make them more discoverable to others interested in similar topics. Hashtags facilitate conversations and interactions among users, enabling them to engage with specific content themes or trends.


An example of a hashtag is “#ThrowbackThursday,” often abbreviated as #TBT. Users on social media platforms like Twitter, Instagram, and Facebook use this hashtag to share nostalgic photos or memories from the past, typically on Thursdays. By clicking on or searching for the #ThrowbackThursday hashtag, users can explore a stream of related posts across various accounts, connecting with others who are participating in the trend.