- Definition: The hashtag symbol, #, was initially used as a way to group posts or pictures by category, phrase, or theme on social media, primarily on platforms like Instagram and Twitter. The term “hashtag” became popularized in 2007 when it was first used with the purpose of finding posts with a common theme.
- Example: The hashtag symbol was first used to find and group tweets with a common theme, and it has since become an integral part of social media communication.
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