Scene Creator / Scene Generator / Scene Builder
All of these basically come down to a collection of Photoshop files that contain necessary elements to build a digital scene, i.e. an arranged collage of items.
Scene Creators have become very popular with designers and online entrepreneurs because they allow to create wonderful promotional visuals, be in control and save lots of budget by using pre-made digital elements as opposed to hiring a designer and a photographer each time.
Using a scene generator, you can make any type of compelling visual content, and the most popular use are so called hero images and product mock-ups.