To build a web at first you should think about web template design regarding with your product and mockup. Now it is time to take help from Photoshop and its respective tools. Some of the elements have to extract and readied for your website really. Your product images, company images and many others relative images absolutely should manipulate with Photoshop including clipping path, image masking, raster to vector tools. So if you want to get your website like most important part of your business to organize a website it should not be forgotten never about the mentioned tools.