If the image is not losing its quality, choose JPEG format over PNG for your images.
Images in JPEG format are usually smaller in file sizes when compared to PNG format.
For example, if you notice in the above screenshot, both the images are 1000px wide and compressed using Tinypng.
But the image in JPEG format is almost 70% smaller in file size.
This logic is especially true for Photographs.
Make sure all your Photograph based images are in JPEG.
And for images that represent Screenshots, Illustrations, and paintings, first, go with PNG format.
If the file size is less than 150kb, stick with PNG so that the quality of the image is not weird.
