On April 21, Google will make a significant change to its algorithm, increasing the importance of mobile sites. In short, mobile-friendly sites will be noticeably ahead in the rankings.
It is necessary to make all sites responsive or mobile-friendly quickly.
You can open a subdomain like mobil.siteadresi.com and create a mobile site just to pass the algorithm, to be done professionally later.. When entering the main site, we set up a redirect to the subdomain. This way, Google accepts the site as mobile. You can test it here.
They particularly want to draw attention to the use of Bootstrap and similar libraries. I think sites created using JavaScript are a step ahead on mobile compared to those where separate interfaces are prepared for each page.
Honestly, I am not dealing with the mobile theme; I think responsive design handles the job.
What they mean by mobile here must be responsive. I checked Google Webmaster Tools, saw 1,500 mobile usability errors, immediately implemented a responsive design, and came to my senses.
I spent days working to make my two sites mobile using responsive design, but I was shocked when I woke up this morning and saw the article here. It says responsive doesn’t mean anything and that you need to build a mobile site. It talks about a separate site in the form of m.sitename.com.
I think responsive is enough. We’ll see on April 21st anyway. By the way, it seems only mobile search results will be affected.
@cryptosam @Sanalgezgin57 Friends, in the information on the Google site, there was an indication that if your site says it is compatible in the Google compatibility test, there is no problem, but I want to ask you a question. For example, when a mobile plugin is installed on a WordPress site and put through the “Mobile Friendly” test on Google, it returns a successful result, but in the Webmaster Tools panel, in the “Mobile Usability” field, it returns the response “No mobile usability issues detected. Make sure to check all site variations.” Doesn’t this mean that this problem doesn’t exist?
Additionally, @fatihsel sir, I did not see a condition anywhere stating that responsive is not sufficient and that it must be m.siteaddress.com; I will examine the link you sent shortly. I would be very happy if Master Cryptosam comments on this subject, as I don’t think it would be such nonsense; asking for a mobile theme again on a different link in addition to the responsive themes made would be the height of absurdity.
The answer to the first question is very important.
I directed the question to the relevant person; responsive design falls under the responsive web design item, so it shouldn’t cause any issues. However, the relevant author Gary Illyes shared information and added “• Responsive designs will have no benefit in ranking.” below it. I asked my question in the relevant topic; let’s see if he can share a source regarding this subject he mentioned.
Update: Most likely the user made a wrong inference or wants to direct people to mobile theme sales. Any person with common sense will find the answer when they read the mobile guide articles published by Google. If sites pass the mobile compatibility test, there is no problem, but I want to touch upon another crucial point here; on some sites, a value called “blocked resources” is returned. Google points to the robots.txt file of the websites giving these errors, but these robots.txt files do not contain a parameter to block the mentioned .js or other files. I am researching this; it would be good if friends experienced in this subject contribute.
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Related discussion
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@fatihsel Google wants responsive design, there is no one who doesn’t know this. The purpose of that remark becomes clear at the end of the topic anyway. Everyone on R10 is trying to deceive each other now. We used to read useful articles and learn things in the past.
I have a problem like this. 70% of the traffic comes from mobile. They don’t click on Google, and earnings drop by half when it is responsive. From now on, I will close the responsive theme on popular days to increase revenue, and open it on other days. Let it be for the best.
So, do you think the mobile theme sold here for WP systems works?
Guys, right now all the sites ranking for an important keyword are mobile incompatible… Will this update definitely hit every type of site? I mean, does a site that doesn’t have a mobile visitor base also have to be mobile compatible? Or will this update only apply to mobile searches? If non-mobile sites lose ranking in all cases, I guess I’ll hit the first spot 
It is obvious that this update will be for mobile compatibility. There are people saying that there will be other factors in the update as well. It is said that comment counts under topics, time spent on site, and bounce rates will be evaluated as criteria. How accurate are these??
I would appreciate it if you could let
Guys, is there an update…
On April 21, a mobile theme update was going to be made by Google. It was said that non-mobile themes would be dropped from mobile rankings. According to what was said, this update took place on April 21..
My site has been mobile-friendly since it was first launched, but for some reason, Google dropped me in the mobile search rankings 
Guys, when I look at Webmaster Tools, the update started on April 21st, but there is no sign that it has finished yet. Is there a possibility that Google continues without finishing, perhaps with a new update, because there is fluctuation, or does it just seem that way to me because my site hasn’t settled yet…