This is a tool used to test websites for standards conformance. You can add any URL to the "Site Scan" tool and get a report on how well the web developers did their job.
Do this for the
weight watchers site and you'll see they have at least two big quality issues, which would imply they have very low standards if that is what they call "normal". Hit them with that and see how they respond.
The good thing about the tool is that it helps web developers quickly understand what is wrong and tells them how to fix it. For everyone else it is a great way to ensure web developers actually do their job.