Clickbait tickles your curiosity with some wild and crazy idea, and invites you to click to find out the "whole" story.
Seems innocent enough, right?? Except, it isn't.
When you share clickbait and encourage your friends and connections on social media to explore that deceptive site, you're in effect becoming a mouthpiece for the owner of that content.
Facebook will be banning all posts expressing religious beliefs? Seems legit. Bill Gates will give you $5,000 just for sharing a photo? Sure. Obama rebuked by a former Navy SEAL? Right. One thing many of these have in common, you might notice, is that you're invited to click on a link which takes you to someone's website, or Facebook page associated with a website which invites you to visit.
Once there, mission accomplished as far as the website owner is concerned.
They have lured you in, and in doing so, subjected you to a barrage of ads, ads which make them money. Your visit to a site set up with various advertising means money for them. Your sharing that clickbait with your social media connections means even more money, especially if that content goes viral. Given that you've lent your credibility to it by sharing it with people you know, that is entirely too possible.
Do yourself, and your social media connections, a favor. Search before you share. Use due diligence and check your facts, because what someone else tells you is truth may turn out to be utter crap designed solely to spread lies and make that someone advertising revenue.