When you change in the external style sheet, the web page opens the same. There are no errors in the code. What should I do?

Question

css

Good day! I'm new to this business)
Help, please!
I'm doing the task according to the textbook, I'm writing the code.
I'm formatting a web page using external style sheets.
I open it in the browser, there are no changes.
I'm trying to force a page reload, no change.
I checked my code in the answers to the tutorial, there are no errors.
What to do? It's caching and I'm still doing something wrong?

Answer 1

Open DevTool by CTRL F12 in Chrome and look at the source code of your page.
Also in other tabs you can find other external files that you connect and see what information the browser has loaded (or received from the code).
By the way, in the same tab you can see which files (data) are loaded (200) and which are taken from the cache (304).
Study this tool, it will help you very often.
PS. Here you can make edits using F2 without changing the file. I tried it, then transferred the correct changes to the file.