+ Product Grouped can addable the products other on a product page.
+ The buyer only buy the products into the product group, So you can add the main product to the product group
To create a product page and be able to display more such other products. You need to follow these steps:
1. Open a product page available, copy the name of that product.
2. Go to Online Store -> Navigation select Group Menu.
3. You need enter fill these sections: Title, Handle & Menu Item, then click Save.
Go to Products -> Choose product just have added -> CLick to View To see the result:
Thank for reading!