Sometimes the website needs to show the products to specific customers. These products are only available for those customer groups. That's why the TMD created a module that will always check the visibility of the product before displaying it to the customer. And make sure products will only show to the customer that was assigned by admin.

It also restricts the categories to display to customers. This extension creates a new section in product and category editors where admin can assign the customer group whom the product should display. It is one of the easiest ways where admin needs to do less work to get the result. OpenCart Restrict Products Customer Group