Mobile-first design means creating apps and websites that work great on your...

https://www.red-bookmarks.win/mobile-first-design-means-building-apps-or-sites-to-work-great-on-phones-before

Mobile-first design means creating apps and websites that work great on your phone right from the start. It focuses on fast loading, easy-to-tap buttons, and simple menus that make browsing quick and smooth