Which type of Image is best suitable for SEO and why?

Although there are numerous picture formats available, the PNG and JPEG are the most popular for use on the web. PNG: Produces images of higher quality, but has a greater file size. JPEG: Image quality may be compromised, but you can change the quality setting to get a good compromise.

The most popular image formats on the web are PNG and JPEG, however there are many other options. Better image quality is produced with PNG, but the file size is higher. JPEG: You might experience image quality loss, but you can change the quality level to achieve a good compromise.