Mobile performance affects usability, conversion and search visibility. A page that looks polished but responds slowly can lose users before its message has a chance to work.
Measure the real experience
Begin with field data when it is available. Real-user metrics reveal how the site performs across different devices, networks and locations; laboratory tools help diagnose the technical causes.
Optimize the largest assets
Resize images for their display dimensions, use efficient formats and load below-the-fold media only when needed. Video should have an intentional loading strategy rather than downloading automatically on every device.
Reduce unnecessary work
Remove unused scripts and styles, prioritize essential resources and limit third-party code. Every additional tag can add network requests and processing time, particularly on less powerful phones.
Use caching and reliable delivery
Cache stable assets, compress responses and use a content delivery network when it supports the audience. Re-test after every significant release: performance is an ongoing product requirement, not a one-time optimization.
