How to test the layout of the site?

Question

Software testing

When they give a site for adaptability testing. How to determine, for example, on browserstack.com how many types of test options should be taken? Those. how many browser versions to test, on how many devices and how many operating systems?

Answer 1

I would make the following columns:
ID / Base for testing (test 1,2,3; Fight) / Test case description / Actual result / Expected result /
Comment necessary.