Optimization Image to Reduce Loading Time
You should also go to a greater length and optimize every image on your site to ensure it loads in the least time possible, like under 30 seconds. You should use image editing software to remove unnecessary information on your images, and thereby effectively reducing the file size of your image without affecting its appearance.
If you own Photoshop, it will be obvious to you that when you save an image as a JPEG file, a dialog box appears and lets you choose the "quality" of the JPEG image -- normally a setting of 8 to 10 is good enough as it will preserve the quality of your image while saving it at a small file size. If you do not have Photoshop, there are many free image compressors online that you can download and use to reduce the size of your image.
On the other hand, you can choose to save your images in PNG format to get the best quality at the least file size. You can also save your images in GIF format -- the image editing software clips away all the color information not used in your image, hence giving you the smallest file size possible. However, saving in GIF format will often compromise the appearance of your image, so make your choice wisely!
