How to get this kind of output in google?

Question

Search Engine Optimization

How to achieve such issuance, what should be prescribed? Where to read about it?

Answer 1

What you have displayed for Russian mail will appear because you entered a branded query, most likely "Russian mail" or mail is a very popular site, and the query is directly relevant to the topic.
The below are just quick links, read the Google manual .

Answer 2

These are the so-called quick links, search engines do it themselves, you cannot control this process. If the search engine considers some page or section of your site worthy of a quick link, it will add it to the search results. Alas, according to the statement of the PS, it is impossible to influence this.
But personally, it seems to me that these quick links are the most important and visited sections of the site. Often these are catalogs, contacts, directions. Work on the site, and you will definitely have the same ones.