A hashtag is a metadata tag operator that is prefaced by the hash symbol, #.
Messina made no attempt to patent the use because he felt that "they were born of the internet, and owned by no one".
Usually I am annoyed by the use of Hashtags on social media, especially if it are too many of those. But on this account a I am trying to archive my bookmarks from different apps and merge them in one place, so I can find them easier in the future. This is mainly something I do for myself, but I decided to do it publicly, so others can profit from this too.
Since I want to be able to search my own bookmarks effectivly, starting NOW, I will add a bunch of hashtags to each of my posts here. If this is annoying to you, I am sorry for that. And I want to appologize to everyone reading this with a screen reader.