Site layout dimensions?

Question

Design

Frame width 1920. This is understandable.
What should be the grid width? Everywhere they write differently.
For example, I want to make 1180 (12 columns, width 80, gutter 20). To what extent will it be correct? Or what would you recommend instead?

Answer 1

What screen resolutions should I design websites for in 2021?

Answer 2

bootstrap 4/5