The new Summary Report gives you a global overview of the status of a site, including the counts of total HTML and accessibility issues found, and a percentage of the total number of web pages that passed all the checks.
Now, the Summary Report has been upgraded to also include the main issues found, both for the HTML and the accessibility checks. This new view will show the first 3 main issues found, ordered by importance - so you have a clear hint of what to fix (or mute) first.