There was recently a change made where you can view the results for a query without personalization. In its current form there is no detail provided on how the personalized results are different from the unpersonalized results.
In the screenshot attached, it says 2 results were blocked but the user is given no detail about what they are. Being able to see what the blocked results are would help the user make a more informed decision on whether the unpersonalized results provide any value or not.
When you click on ‘x blocked results’ it tells you which ones were blocked and which personalization led to the results being blocked.