In Magento2 Reward Points, a customer can earn reward point in three ways:

1. Reward Points on Registration– A Customer can earn some reward points by successfully registering on a web store if enabled by the admin. The admin will set the reward points for the customers on registration.
2. Reward Points for product review– The Customer can also earn reward points by submitting a review of the product if enabled by the admin. The admin will set the reward points that a customer will receive on submitting a product review.
3. Reward Points on Purchases– A customer will get the reward points on their purchases. The reward points to be received on purchases will be set by the admin.

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