https://apnews.com/7e47fead8cb44e8e8dc817dee65a432f

SEATTLE (AP) — The attacker who killed two people in a shooting at a German synagogue livestreamed the assault on Twitch, a video service owned by Amazon. It was one of the first violent attacks streamed on the service, which is best known for letting people watch others play competitive video games.

Here's what you need to know about Twitch.