All digital images need to meet the following requirements:
Resolution - Images need to be at least 72 pixels per inch (ppi), which is the standard size for web images. Higher resolution, although important for printing, is not necessary for web.
Size - Images need to be at least 890 x 445 pixels (px).
Format – Images can be in any of these formats: jpg, jpeg, gif, or png.
File Size – Images need to be 30MB or less.