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

https://www.red-bookmarks.win/mobile-first-design-means-building-websites-or-apps-starting-with-the-phone

Mobile-first design means creating apps and websites that work great on your phone from the start. It’s built for quick loading, so you don’t waste time waiting. Buttons and menus are easy to tap, even with just one finger