The site does not have a description in Yandex search results. How to make a snippet?

Question

Search Engine Optimization

Hello. Tell me, how is it done now in 2019?
I made a robots.txt file in Yandex webmaster, drove the site to which it received the status "verified" The page is crawled by a robot and is in search.
But in the search results, there is only a link to the site and no description, etc.
Added on the main page after the head

<title>Название сайта</title>
<meta name="description" content="<?php 
if ( is_front_page() || is_home() || is_category() ) { 
echo '...Описание сайта...';
} ?>" />

Next, the pages were re-bypassed in Yandex Webmaster. But as a result of the search, there is still no description.
I wrote a description in the Yoast seo plugin and there is no snippet either.
I don't understand anything about optimization and seo. I'm already silent about promotion by keywords or query. Please tell me how to make the description right. After all, they do the same and add quick links somehow.

Answer 1

How long has it been since you made the description? Most likely, you just need to wait for Yandex to load this data.
It's very unlikely that the problem is something else.