After you have searched the URL for the page you want to analyze you will be shown a picture of your page/along with some issues if there were any and recommendations on what you need to do so it doesn't continue to sabotage our SEO rankings.

So this what my pages looked like when I analyzed them.

As you can see there are 3 errors on the page. The description tells me I have mutliple <h1> tags and the locations of those offending <h1> tags are marked with a red button with a plus on it.

If you click the button and the "expand" it looks like this:

This tells me the specifics about the error including: the severity and the location.