Starting April 21, 2015, Google, the search engine used for more than 90% of searches in Italy, will change its ranking algorithm and will give greater recognition, among the search engine's SERPs, to sites with layouts optimized for browsing on smartphones and tablets, which have become the most used devices for browsing.
Mobile users have overtaken desktop users in the past year, and having a mobile-friendly website is essential not only to optimize your Google rankings, but also to improve the experience of users visiting your site from a smartphone or tablet.
This change will affect mobile searches in all languages worldwide and will have a significant impact on results. As a result, it will be easier for users to find relevant, high-quality links optimized for their devices.
A mobile-friendly website doesn't necessarily have to be developed specifically for that type of device, but can be developed using responsive web design, which optimizes viewing on all types of devices used.