Use sufficient spacing between interactive elements

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Use large, legible fonts

Avoid using technologies that are incompatible with mobile devices (e.g. Flash)
Test your site on different devices and mobile browsers
Loading speed optimization
Page load speed is a key factor in user experience and search fusion phone number data engine rankings. Here are some optimization techniques:

Image compression
Minification of CSS and JavaScript code
Browser Cache Usage
Resource Delivery Optimization
Using CDN (Content Delivery Network)
It is also worth paying attention to the Core Web Vitals metrics , which are an important ranking factor for Google.

Mobile friendly design
A mobile-friendly site should provide a smooth and intuitive interaction for users using small touchscreens. Key aspects include:

Easy navigation with clear buttons and menus
Clear forms with appropriately large fields
Avoiding pop-ups that can be difficult to close on small screens
Optimizing content for quick visual scanning
Mobile-First Indexing.