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

https://mill-wiki.win/index.php/How_to_Prioritize_Content_on_a_Small_Screen_Without_Cutting_Features

Mobile-first design means creating apps and websites that work great on your phone before anything else. It’s built for speed, so pages load fast even on the go. Buttons and menus are larger and easy to tap with your fingers