If you use it, what do you like about Snapchat?

In light of current world events, decentralized social media seems to be the direction to go in. I don't mind trying my hand at making a app but I'd like to know what people really like about these apps or think can be improved before making my own. I guess every week, ill ask about a different app but lets start with Snapchat.

Do you use it? What do you like about it? Or, what do you dislike about it? was there a feature that used to exist that no longer exists that you liked and want back, tell me about it? Have an idea to improve a feature, let me know?

All feedback is welcomed