What is the mobile version of the site and how to check it

Mobile version of the site – SEO WIKI

The mobile version of the site is a separate site from the main one, designed specifically for working with mobile devices. Most often – a stripped down version of the main site.

For example, this is the mobile VKontakte site:

Creating a mobile version of the site improves the position in the search, but it is perceived by search engines as a separate site, and this changes the approach to promotion. You can check the mobile version of the site using special services from search engines:

Google Optimization Check for Mobile and WebPageTest.
Checking mobile pages in Yandex.Webmaster.

Or using third-party services:

QuirkTools;
WebPagetest.org;
RESPONSIVE;
PR-CY;

Read more about responsive design, its advantages and disadvantages in a special article about the convenience of sites for users of gadgets.