Use Tools to Test Responsiveness
There are a ton of online tools available to quickly check how responsive your website is, and we recommend you take full advantage of them! Tools like Test My Site, Mobile-Friendly Test, and many others allow you to test your site by just inserting the URL link and get suggestions on how to improve its performance.
Source: Test My Site by Google
Once you get the test results, pay attention to how well your site adapts to different screens, how clear the text is, how large the images are, and how fast your site loads.