If you want to be thorough, press F1 while the tool is running. This allows you to change the test mix to "Extended," which is much more rigorous but takes significantly longer. For most users, "Standard" is perfectly fine.
A small window will pop up with two options. This is where the decision-making happens. how to run a memory diagnostic windows 11
Windows doesn't shove the answer in your face immediately. If you want to be thorough, press F1