My favourite app is Instagram. You can try the effects in this app. People are sharing current videos. It has story function and post function. I also have a profile, but in private mode.

Good things;
You can use it for entertainment and share your stories with your followers.                                                                          
Bad things;
Watching people's stories can be boring. The other negative side is that there are hackers. These people can steal your account and do bad things.
My Opinion;
In general, I think this is the best application. By the way, there is a phenomenon of this social media. People who are followed by people are called "Social media phenomenon". People use it in two ways: private mode or regular mode. It has both negative and positive sides. I think it's a good app.