Google launched a simpler website testing tool today that allows business website owners check how their websites performs on mobile web, with the fact that mobile devices are taking over the computing space & searches it is very important that websites perform favorably on mobile devices too.

The tool is simpler as opposed to tools like PageSpeed Tools, Mobile-Friendly Test, e.t.c. which are developer & technical users centered, you just need to enter your website url and click on "test now" button, result of your website will be displayed in a very detailed and simple report, three main parameters will be checked

mobile support of your website.
speed of your website on mobile.
speed of your website on desktop.

Google went further in giving assistance to website owners by sending a suggestion to the website owner of things to do via email. This is really cool, :-D.

visit the tool here http://www.testmysite.thinkwithgoogle.com/

source: http://techneer.