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

https://www.newpelican.com/articles/why-mobile-first-design-has-become-the-standard-for-modern-digital-services/

Mobile-first design means creating apps and websites that work smoothly on your phone first. It’s all about speed, easy-to-tap buttons, and simple navigation that helps you find what you need without extra hassle