Practical explanation:
In practice, mobile optimization means ensuring that pages load quickly, content is readable without zooming, and navigation works smoothly on smaller screens.
How it works:
Websites are optimized for mobile by using responsive layouts, flexible images, simplified menus, and performance improvements tailored to mobile devices and networks.

Why it matters:
Most users access websites on mobile devices, and search engines prioritize mobile-friendly pages. Poor mobile experience can lead to lower rankings and higher bounce rates.
When to use it:
Mobile optimization should be applied when building new websites and when improving existing ones, especially if mobile traffic represents a large share of users.
Related terms:
Responsive Design, Mobile-First Indexing, UX, Page Speed, Web Performance