Infobox: Common Loading Speed ​​Optimization Mistakes

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Incorrect use of image formats, lack of CDN for static files, and unoptimized fonts that slow down rendering.
Additional tool: Lighthouse
Google's Lighthouse provides a detailed analysis of your site's performance, australia phone number list including recommendations for troubleshooting. The results can help you identify hidden bottlenecks.
website usability
2. Mobile adaptation
More than 60% of traffic comes from mobile devices. The site should work equally well on all types of devices.
How to check:
Tools: Google Mobile-Friendly Test, Responsinator.
Metrics:
Ease of navigation on mobile devices.
Size of fonts and interface elements.
Recommendations:
Use responsive design.
Avoid large pop-up windows.
Make sure the buttons are clickable and not too small.
Bonus Tip: How to Improve Mobile UX