How to define the main image on the product page?

What dimensions and which visual to use for the main image of the product page?

The featured image is the first visual contact users have with your product page.

Its objective is to attract, reassure, and seduce your future customers.

We recommend you:

Use a size of 1000px maximum x 300px ;
The ratio of the image is about 4/1 ;
To prefer a PNG ou JPG format with little compression;
To choose a marketing oriented image rather than informative, as it gives an atmosphere to your product page. It must also contain only a small amount of text and it must be centered ( the image can be cropped depending on the resolution of the page);
Not to use your logo, as it is already present on your page.