Why are there different values ​​in the Yandex site: and host: results?

Question

Search Engine Optimization

Why is description not displayed in the site: output? Is this a problem with the site?

Answer 1

1) As for me, they tried to stick a lot of keys into the meta description on the main page. It looks a bit over spammed (for example, the word Online is heavily out of context) and that Google and Yandex do not display it.
2) No meta descriptions on 43 pages.
3) Move the styles from the main page with inline to an external file.

Answer 2

Open the Yandex help and read it
A snippet is a block of information about a found document that is displayed in search results. A snippet consists of a title and a description or annotation of the document, and may also include additional information about the site.
...
In most cases, the title and description of a site page in search results are generated based on the content of the page. In particular, the title is taken from the title element in the HTML code of the page, the description is taken from the page text, including Open Graph and schema.org micro-markups, as well as from the contents of the Description meta tag.
An example of using Open Graph
In addition, the description can be collected from additional sources:
Yandex.Catalog, Yandex.Market, DMOZ. To opt out of descriptions from Yandex.Catalog and DMOZ, add the robots meta tag to the HTML code of your pages.
The text of links to the page posted on other pages of the site or third-party resources.
Thus, the most informative and relevant text for the search query is used to describe the page.

Answer 3

Don't beat your head. Everything is ok here.