Ok, so maybe that’s a bit of an exaggeration, but let’s face it. The strength of your passwords is important. If it wasn’t, why would so many people be interested in hacking them!
Passwords keep your private stuff private. They make sure that the emails sent from your account are actually written by you. They make sure that the Posts, Likes and Comments that appear on your Facebook page are authentic. They keep your Dropbox photos private.