Hi my friend. Product mockups are valuable tools for optimizing presentations, promoting your design and increasing sales. They allow you to translate your creative ideas into concrete, compelling images that connect with your audience. I decided to find you somehow a good source to explain everything clearly and found this article https://www.detectmind.com/how-to-create-a-product-mockup-on-photoshop/ , which explains everything in detail. I think that if I had my own product, without a quality layout, it is unlikely that you will be able to promote it.