This is how I would feel when someone tells me a funny joke about my mom for instance in a text message or on a social media exchange. In some situations instead of actually sending them back a typed text message you can actually send them an expression like this. Also, this expression is more fun and creative to be sharing with social media long with text exchange.
Reaction GIFs are a fun and unique way of expressing your feelings and how you would respond to a statement or situation. For instance,these days especially with the younger generation, people tend to drift towards reaction GIFs when they are exchanging views and even comments on various forms of social media. Reaction GIFs have definitely been giving a new outlook on social media and even regular messaging and emailing.