Most novice web designers at the beginning of their journey still in the courses hear such a concept as modular grid, and wonder what it is and how to properly customize and use this tool.
From personal experience, I know that in many courses with titles "web designer from zero to pro" or " IU / UX designer in a month" this topic is either skipped, or give instructions, where they say everywhere to use a grid of 12 columns with margins of 80 to 100 pixels. And, as a result, it turns out that after taking these gore courses, a person sees beautiful works, thinks to repeat them, but the grid does not work, and the student, simply, does the work without a grid and completely forgets about it.
That's why I want to help beginners to understand this really voluminous issue.