3 of the main factors in determining your search engine rankings relates to the number of visitors and the time they spend on your site. Needless to say, if your website looks crap on mobile, or is difficult to navigate, people will bounce off quite quickly and are unlikely to return.
With well over 50% of web users using mobile devices, it’s no wonder Google puts a huge emphasis on how mobile-friendly (or responsive) your website is.
So another SEO trick is to ensure your website is optimised for mobile view. Not sure if your website is mobile-friendly? You can use Google’s very own test tool to find out for yourself and also get suggestions on what needs fixing: https://search.google.com/test/mobile-friendly