Finally, what was announced a long time ago happened. Google has repeatedly announced that it will favor sites that have a mobile version, and now it is really happening.
Users searching through mobile phones will be forced to only mobile versions of sites and the search result will be much faster than on desktop. And when it comes to desktop search, Google will force sites that have a mobile version as well. And thereby improve the position.
This is definitely a big problem for sites that don't have a mobile version. What is important about search is also the difference when you optimize your site for mobile search and when you create a new mobile site with, say, the prefix m.vassajt.com. There are tests that tell you how good your mobile site is. You can find one of these tests on Google's webmaster site, as well as suggestions on what you need to improve.
The most important thing about the mobile version is fast loading. Therefore, it is very important that you adjust the images and javascript to allow your users to surf quickly and easily.
