What does a mobile-optimized website design include?

A mobile-optimized website design includes a fluid grid layout that reflows content elegantly at every breakpoint, typography scaled to a minimum of 16px base size for readability, touch targets sized to at least 44×44 pixels, and navigation patterns suited to thumb-based interaction such as hamburger menus or bottom navigation bars.

It also includes serving appropriately sized images using responsive image techniques (srcset and sizes attributes), lazy loading for below-fold assets, and minimal render-blocking scripts that could delay Time to Interactive. Form fields should use mobile-specific input types (tel, email, number) that trigger the correct mobile keyboard, and checkout or enquiry flows should be condensed to reduce the number of steps a user must complete on a small screen.