Technical Definition
The term “hashtag” describes using the “#” pound or number sign to identify a keyword or topic on social media. However, hashtags were first used on Twitter and later spread to Facebook, Instagram, and other social media sites.
Similarly, the usage of hashtags to highlight topics among Twitter users developed naturally. Today, Twitter groups posts using them to improve its search functionality. Consequently, careful hashtag promotion and engagement with target audiences are essential to a successful social media marketing campaign.