Mobile-first design means building apps and websites starting with phones in...

https://www.runway-bookmarks.win/mobile-first-design-means-building-apps-and-websites-to-work-great-on-phones

Mobile-first design means building apps and websites starting with phones in mind. It focuses on speed, so pages load fast even with slow connections. Buttons and menus are big and easy to tap, making the experience smooth and frustration-free