several reasons firstly most people tend to follow trends and hashtags is a popular trend now also because if you put a hashtag your picture will go under that group and people can view your picture, which will result in more likes and comments (which is what makes people happy these days) I personally do not agree with this and I think it is sad but it is the truth
hashtags are basically like categories on social media if someone searches for that hashtag then that persons post will come up, this will usually result in more comments/likes/views which is all that social media has become about these days
People always make something up just to do anything. Others think it's stupid. I personally think it's stupid myself. While others think it's cool. Someone once told me it is just an expression to use. I don't use Twitter or Facebook. Nor am I planning to in the future. But like I said, it is just an expression to use.
to describe something without really needing to put an explanation, or to make it easier to find. like if you want to look up puppies on i dunno tumblr, you can just type in puppies and you'll find a list of them in no time since others put the hash tag puppies in the hash tag list below the post
5 months ago
Last edited at 11:34PM on 10/23/2013
Well this thing is used to make it visible on that website in search results. For Example when I search Tina Johnson [IF YOU HAVE USED " #TinaJohnson " SOME WHERE IN POST SHARE ETC]. Then in search results you'll find all your postings. Try it. :)
They use hashtags to express how they feel. I think it caught on because not only could they share how they felt, but with the hashtag feature they can find and interact with other other users that feel the same.