Before being able to bill someone regularly, we'll have to set up a product that has special subscription billing details. Subscription products are very similar to simple products and only take a few extra steps to set up.
In order to add a subscription product with the help of WooCommerce Subscriptions, implement the following steps:
From the WordPress admin, go to Products | Add New.
Add a Product name and Description as you would for any other product.
Scroll down to the Product Data panel and change the product type to Simple subscription. You'll see several new fields appear.
For a subscription product, you must fill out the Subscription Price ($) field. The Sign-up Fee and Free Trial fields are optional. You can also change the billing period right next to the Subscription Price field.
Click on the Publish...