Knowing how to block someone on WhatsApp is important for your online and personal privacy and security. If you're in the unfortunate position of feeling pestered, annoyed or endangered by another person messaging you on WhatsApp, blocking them is the best way to quickly curtail that, and usually the first avenue of defense.
It's also pretty much the best way to deal with those super annoying spam messages and calls that come through via WhatsApp. You may want to read our guide on how to automatically block spam calls on WhatsApp if that's an issue.
