Have you noticed your website has dropped down Goggle's organic rankings?
Last month Google introduced a new algorithm which is intended to favour mobile friendly websites. If your website is not mobile friendly it is likely to be penalised and ranked lower than before.
What is mobile friendly?
In short, a mobile frindly website is responsive and adapts according to the device on which it is being browsed.
If you are not sure whether your site is mobile friendle, there is a quick test available on Google which will tell you. If you click on the following link and add your URL (your web address) you will soon find out: https://www.google.co.uk/webmasters/tools/mobile-friendly/