Web, domains and email
mobile-first
In short and in plain language
Mobile-first is a way to design a website.
The site is planned first for small screens like phones. Then it is built out for larger ones.
Big search engines mainly look at the mobile version of pages. This is called mobile-first indexing.
Definition
Mobile-first is a design approach in which a website is planned first for small screens such as smartphones, then for larger ones. Major search engines primarily evaluate the mobile version of pages, which is known as mobile-first indexing.