My Twitter Account Was Hacked!!!
It’s highly unlikely that anyone’s Twitter account was hacked. In the case of spammers using your account to run ads on your timeline, this usually comes as the result of you, at one time, having given some website’s app approval to do this.
The Simple Fix:
How to avoid this in the future:
The next time a website asks you to “sign in with Twitter”, don’t. They can’t gain access to your Twitter unless you specifically allow them access, so read before you click anything on any website. If you’re a bit of a goof and tend to click things without reading first, be sure to periodically check your settings on Twitter (as shown in above screenshots) to make sure you haven’t allowed anyone access to your account.