GIFs are a major form of communication online, used for reactions, punchlines to jokes, simple greetings, and just about anything else.
If you've spent any time messing around with GIFs, you've probably spent some time with GIPHY. The site is a GIF search engine and an essential stop for anyone who spends a good portion of their life online.
See 7 things you didn't know you could do on GIPHY
All kinds of fun stuff (and even some things for work).