Hashtags are a way to organize data. They are popular on social media. Using a Hashtag, (#) allows you to have your post show up with similar post on the same topic.
For example, if there is a breaking news story people may start to talk about it on social media. To ensure others see their post, they can include a Hashtag # followed by the topic. This will include the post in the collection of posts that all have the same hashtag.
There are a lot of social media site that use Hashtags. It’s a good way to get in on a conversation and organize your post so they show up with similar posts on the topic.