Why?
A lot of people have been getting in trouble lately because of tweets they sent a long time ago. People change a lot and probably have different views now compared to some years ago. To be sure your twitter account doesn’t contain any offensive tweets you don’t agree with anymore.
It isn’t a tool to censor yourself but to make you aware of these tweets.
How?
Your public tweets will be scraped from twitter.com. This means that only tweets that are publicly available will be scraped and you don’t have to login with twitter for your account to be scraped.
Just fill in your username and wait a few seconds to minutes for your account to be scraped.
You'll get a list of all your tweets that contain bad words with links to each tweets so you can do anything you want with those tweets.