Have you realised the use of hashtags on social media such as Facebook, Twitter, Instagram and the others? Do you know its significance aside being used for fun on these social media? Did you know that a lot of people only use hashtags for its highlighting feature? This, therefore, accounts to the abuse of hashtags...but...hey, do not worry. Get into the fun zone. Just that don't #spam #with #hashtags. Don't over-tag a single post or tweet. (Best practices recommend using no more than 2 hashtags per post or tweet.)
A hashtag is a word or an unspaced phrase prefixed with the number sign ("#"). It is a form of metadata tag. Words in messages on microblogging and social networking services such as Twitter, Facebook, Google+ or Instagram may be tagged by putting "#" before them, either as they appear in a sentence (e.g "The weather is #hot")