How to sign out of iCloud or Apple ID, sign in again, and the consequences

Ankur Thakur, iDownloadBlog:

This tutorial shows you the steps to sign out of iCloud and your Apple ID (both are the same) on your iPhone, iPad, Apple Watch, and Mac. It also mentions the steps to sign in again. The entire process is easy but has some consequences. Let us tell you everything about this.

This is one of those topics that comes up periodically. Makes you wonder, what happens if I sign out of iCloud in this particular instance? What data will I lose?

Worth the read, well presented.