Item with white background. This is Amazon demand for main image.
The main use of those images is to get clients attention (in Main image), and show him details of the item (in the images inside the listing).
This is mainly for showing the item in use. Helping the client understand the way of use of the item, and the way it will help him once he purchase the item. The image may include a human palm in order to show the use, and/or the use of accessories as needed.
This is mainly to give the client an atmosphere of the item in use. Help him see a vision of the item used by him. Images of this kind include accessories, and a surrounding set or location.
Upgrade your images and add a significant product visibility advantage to your listing appearance.
Text/graphic basic needs that help the client understand the product better. Like: dimentions, element enlargement circle, explaining about specific element in the product, etc.