Does the semantic markup of pages affect the results?

Question

Search Engine Optimization

A third-party company made a technical analysis of the site and found that: "There is no semantic layout for contacts and product cards." They offer them overwork for a certain amount to do everything right. Does the site really need it to be well indexed? Site type - online store. The main promotion is seasonal Direct. Thank you in advance for your help!

Answer 1

Here is what Yandex itself writes about this: https://yandex.ru/support/webmaster/schema-org/wha...

Answer 2

for them it would be necessary to deliver.
otherwise ps nihira will not understand where the price is and where the discount is ...

Answer 3

Markup does not affect indexing. But the correct markup affects the attractiveness of the snippet in the SERP, and this increases the clickability of the snippet, which improves the behavioral factors of the site, and this improves the position of the site. But it is necessary to look individually, which project it will help and which not.