What is Serve scaled image ?
Serve scaled image is referred as the term Don’t scale images in HTML or CSS.
The basic logic is that if you are showing a smaller version of that image to your users, then why not make the image file itself smaller too? If you do it will speed up your webpages because the browser won't have to download such a large image.
by making the original image size same as that of displayed image you can save several KB of data transfer.
How Serve scaled image ?
1. You can use software like GIMP,Photoshop to scale your images to new dimension.
2. you can also use online image resizer and optimizer like