Why do you need to create a soft shadow in photoshop? It simply because soft shadows are the kind of shadows that are most forgiving and fit the product images in various cases.
Creating a soft shadow in photoshop provides a lot of options for good design layout and doing non-constructive editing on the product image, which is critical for professional image production.
In this video, I’m going to walk you through a photoshop tutorial of creating a realistic-looking soft shadow for your product and you will have full control in the post compositing in most cases.