Retraction Watch is a website that helps people learn about scientific studies, which are like really big projects that scientists do to learn more about different things. Sometimes, mistakes are made or people don't do things the right way, so the scientists have to take back, or retract, what they said they found out.
Retraction Watch helps us know when this happens so we can understand science better and know which studies to trust. It's like a watchdog that helps us make sure we have the best information to make important decisions.