Yes it’s official, now being mobile friendliness is one of the ranking signal for Google. We have plenty of websites online talking about link building and SEO but no one talks about this one factor. If Google is considering this to be one of their ranking signal then surely there has to be some data behind it which made them to come to this decision.
So please ensure that you go to this official mobile friendly test tool here provided by Google itself to check your website. This too will actually show you how Google search on mobile sees your pages. You can even get a detailed mobile usability report about your website under your search console account.
There is also the official guide from Google to make your website mobile friendly, which can be found here.
After all Google is the number one search engine of the world and also the most innovative company so they value their user experience a lot. It’s almost their number one priority. Hence by this step they also want us to understand that you should always take care of your customers. All your other SEO efforts will not bring fruitful result if you are going to ignore this factor.
So immediately head onto the Google mobile friendly test tool and use the report to optimize your website for the same.