The Mobile-first index appeared following the behavior of users. Starting in 2015, there has been a significant increase in the number of Google searches made on mobile. In 2017, nearly 60% of the total traffic on the Internet is made on mobile devices. After a year and a half of testing, Google officials released a mobile-first index release on March 26th. It aims to improve the experience of smartphone and tablet users.
What is mobile-first index? As the name suggests, the mobile version of the site will be considered primarily at the time of indexing. So, in listing search results, mobile sites will appear among the top positions. In the case of non-mobile sites, the desktop version will still appear, with Google still using a single index, the change being the prioritization of the mobile version.
The Google Update must be followed by site optimization for searches made on mobile devices. In order to cope with the changes made by the mobile-first index, the site must be easy to use, intuitive, and design to be responsive. Content must also be in accordance with user requirements and its format must be compatible with mobile devices.
Google officials have said mobile-first index will not make a major change for sites for which desktop and mobile versions are the same. In this case, no changes are necessary, but if the versions differ, it is ideal to prioritize the mobile version of the main content.
So the mobile-first index brings a radical change. Website optimization for mobile devices should take into account all of its features. From adapting the code, loading speed, ensuring adequate content and responsive design.