Since Google announced their new Mobile friendly label here all webmasters started taking even more serious about making their websites mobile optimized and mobile friendly.
Best Tool to Check if Site is Mobile Friendly and Optimized by Google:
https://www.google.com/webmasters/tools/mobile-friendly/
Being mobile friendly is not a ranking factor yet, however it might become in upcoming days since they said:
Best Tool to Check if Site is Mobile Friendly and Optimized by Google:
https://www.google.com/webmasters/tools/mobile-friendly/
Being mobile friendly is not a ranking factor yet, however it might become in upcoming days since they said:
We are also experimenting with using the mobile-friendly criteria as a ranking signal.