ESPN is the official app for the TV channel of the same name. As you'd expect, it lets you follow live broadcasts and watch videos of the highlights of any sporting event.
It's important to note that although you can follow events live, you can't actually watch them; that is, you can read all the news about a certain football or basketball match but you can't watch the game in real time. To do that, you need to be an ESPN subscriber.
What you can do is watch the highlights of previous games. This lets you to view all the goals, slam dunks, etc. for all the games you're interested in.
ESPN is a sports app that lets you stay up-to-date with everything happening in the world of sports. No matter which is your favorite — soccer, football, basketball — they're all on ESPN.