Buy X get Y is one of the Bundle types offered by Fast Bundle.
Here we have two sets of products.
1 ) Products the customer buys (x)
2) Products the customer gets (Y)
If a customer buys the specified number or amount from the first set (X), they will get a type of discount, whether be a "Fixed discount", "Percentage discount" or "Free gift(100% discount)" on the products of the second set (Y).
How to Create a Buy X get Y bundle:
On your Fast Bundle admin page, click on "Create new bundles".
Choose the "Buy X get Y" Bundle.
Choose whether you want the X and Y to be products or collections.(We continue based on the product)
Choose the products the customer buys(X).
Choose the products the customer gets (Y).
Specify the type and amount of discount that you want to assign to products the customer gets. (Y). You can choose among three discount types: "Percentage discount", "Fixed discount" and "Free gift(100 % discount)".
Set "Name", "Title" "Description" and "(start or end) Time " for your bundle. Then press "Save" and you are done.
Here you can see a preview of how your bundle will look (as an example).
X and Y as products
X and Y as collections