Check layout for overflow?

Question

css

In a short webinar from HTML Academy about Chrome Dev Tools / Elements tab, it is mentioned that it can be used to check the layout "for overflow", what does it mean to check for layout overflow?
PS If possible in your own words, without throwing off a link to texts that are not entirely clear, sort of like translated

Answer 1

https://habr.com/company/htmlacademy/blog/254171/
Also on the topic:
https://habr.com/company/2gis/blog/246831/
https://isqua.ru/blog/2016/06/19/crash-test-viorstki/
You can quickly view the result when designMode is enabled
https ://developer.mozilla.org/ru/docs/Web/API/Docu...