Last doubt of this satisfied user.
When I download an image from my website ( by right-clicking), It saves as JPEG and its size is as high as it was earlier.
Whereas, images from other sites saves as .webp.
In the media library, I found these –
15 sizes compressed (+)
Reduced by 43.7% (701.1 KB)
WebP: 48.9 KB
Ok. Understood. My site’s speed improved a lot. And it gain some points on core vitals.
Thanks.