By adding similar products your customers would be able to look for more products they are looking for easily from add to cart page. In this article you will be able to add similar products.
Login to Backend
Navigate to Catalog -> Product.
You will land on Products where a list of all the added products is displayed. When you go to the Edit option in the Action Column you will land on the edit page of that particular product.
Now, scroll down to Related Products, Up-Sells, Cross-Sells and More Such Products.
Here, by clicking Add More Such Products you will be seeing a list of products among which you could choose the products that you want to display as similar products.
Select the products by clicking on the checkboxes of the product and then click on Add Selected Products.
By doing so, the selected products will be displayed under More Such Products.
Now click on Save in order to change the configurations. In the frontend, navigate to the product and click on the Design It button.
Once you enter the Designer Tool page, click on Add to Cart on the right side of the page. Here you can view the added products which will be displayed as Similar Products.