This is a demo. You can create as many related products as you like. You can choose any set of products or bundles that should load together. This significantly increases page views and people browsing different products on your store. So, the likely hood that they will buy something from you increases a lot. You can create products either in the same category as related recommendations or can add supplementary products that can go well with the products they are interested in buying. The recommendations can load on top, bottom, left, right and in the middle of the page. 5 different locations for you to choose from.
You can also check how recommendations like like from: