What are implicit spam constructs?

Question

Search Engine Optimization

I understand perfectly well that using key phrases like "buy a sofa Moscow" is a spam construct and its use in the text, or even more so in the Title and h1, will immediately lead to a biased ranking among search engines. And what to do with requests, for example, "How to write a resume?" or "How to learn to play the guitar?" are natural words in normal sentences. But on the other hand, the explicit use of the key in the text or headings.
Do such phrases still need to be diluted or modified? Is there a formula for correct text based on key queries?
Thank you.

Answer 1

Naturally, after all, the whole sentence "What are implicit spam constructions" is not an HF request and is not even a LF request, no one asks it at all, except for you and me it turns out))

Answer 2

in such cases, you just need to use common sense.
just every time answer yourself the question, can a person not familiar with SEO make such a headline?
"buy a sofa Moscow" - a normal person would not write this
"How to write a resume?" - no problem.
the point is not whether the phrase is some kind of key, of course, almost everything is, the question is whether it can be used in ordinary life, not by people?