What Is the Mobile-First Index & Why Does it Matter?

What is mobile-first indexing?

When Google crawls a webpage to render and subsequently index it, it looks at it from two perspectives: that of a mobile device, and that of a desktop device. As more an more users are moving away from Desktops and towards mobile devices, it is impartitive that your design and overall UX is for mobile. Google cares and so will your traffic.