Cos they're fun! Use CWs to:

👉 add a summary or subject for your post
👉 to collapse long posts
👉 or to otherwise provide context or setup for the content

They're commonly used to soften bad news, for sensitive topics like politics, or just to hide the punchline to a joke.

It's a bit of fun and makes the timeline a more pleasant place, so give it a try! #mastoTips