It serves scaled images and optimize images

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The benefits of using GTmetrix PRO
Choose the connection type for analysis.
Advanced Options, available for PRO users, lets you test your page's responsiveness on various devices: you can select from over 20 popular smartphones and tablets and run a 3G or LTE speed test . You can save your analysis options as presets for faster and easier testing.

If you use analytics tools like Google Analytics , you can check which browsers, devices and sizes are most commonly used to visit your website and ensure it is optimized for your visitors .

GTmetrix users are often interested in getting the highest jordan whatsapp number database percentage score and a reduced website loading time. Now I will try to explain why some aspects are less important than others and why you should not focus your efforts in an early optimization phase.

If you are lazyloading images on your site, you may not want to take GTmetrix’s advice into consideration. If some plugins do not allow you to serve resized images or optimize images below the fold (such as the author image at the bottom of the post), don’t worry.

This does not affect the actual loading speed of the site as the image will usually load when the user scrolls to that specific section of the page.

Pay attention to the difference between the first and second visit
Are you familiar with Leverage browser caching, Add expires headers and Specify a cache validator? These features indicated by the speed test do not affect the speed of the first visit

But on to the next one. You can add header expirations and specify the validity time to allow browsers to take full advantage of caching.