Does Schema give a ranking advantage and why is it not used?

Question

Search Engine Optimization

In an attempt to raise the site in the search engine, I went through popular optimization methods and came across Schema. Actually, after scoring in Yandex, I saw that micromarking is present only for advertisements, for all others it either does not exist, or it is not displayed.
The question itself is: what are the conditions for displaying and is there any point in bothering at all?

Answer 1

The use of micro-markup gives a visual advantage. In theory, it should raise the CTR and give more traffic. In general, there are 2 options for implementing micro-markup - through html and json-ld, Yandex does not understand json-ld

Answer 2

Of course it does, the search engine does not look for many things, but immediately knows where they are and what, it decorates the results, plus in all services it gives you out with the parameters beautifully shown

Answer 3

Definitely there is influence, but not everywhere.
For online stores it is very important (at least to connect a turbo store).
Of course, it makes no sense to write fanatically for each page, but for example the FAQ pages work very well.