Featured image size
A good starting point for your WordPress featured image size is 1200 x 628 pixels. These dimensions tend to work well across WordPress themes and page layouts, and also look good when shared on social media feeds
A featured image visually represents a post or page on your WordPress website. Featured images usually appear on your website at the top of posts. They also appear when you share your posts outside of your WordPress site, like on social media or news websites. The purpose of the featured image is to draw readers to your content and signal what your posts are about and reinforce your site’s tone and branding.
Metadata isn’t important to the average person. This is despite the fact that the average person takes photos on their phone and uploads them online. The metadata on these photos contains the exact location the photo was taken. It’s a captured automatically and no one really thinks twice
Category image size
A minimum WooCommerce image size of 800 to 1000 pixels is recommended for standard products. If you have more complicated and detailed products, a larger image (e.g., 2000 pixels and above) will let customers zoom in to see the item’s details. So if you choose 800 then make it square 800px x 800px