Google has this link so you can test a few pages, Mobile-Friendly Test.
Many organisations aren't ready for this and need to update the platform, design and content on the business websites. If you aren't in the process of revisiting your website, now is the time. Give us a call on 9331 4258 or email firstname.lastname@example.org
Also an interesting article that may help you understand more about this can be found on Search Engine Journal