Last year mobile searches were greater than desktop searches. It is very necessary to that your website be mobile friendly and have fast page speed. Whether you are doing search engine optimization or paid search. I always recommend using Google Tools when analyzing a website performance.
Are you Mobile Friendly?
Test the pages of your own website to see if they pass Google’s Mobile-Friendly tool.
https://search.google.com/test/mobile-friendly
How Fast is Your Mobile Page Speed?
There is nothing worse for user experience than a slow site. Be certain that slow page speeds aren’t hurting your SEO or conversions. Use another Google tool to your advantage, see link below.