Points are used for tutored services like writing correction and live conversation and to buy premium lessons. You can buy points or they can be earned by tutoring, referring friends and sharing lessons in the Library.
If you earn points by providing one of the services mentioned above, you can exchange those points for cash.
Note that a 15% commission will be withheld by LingQ for each tutor lesson. However, there is no commission for points earned from referrals or sharing lessons.
To find your points balance, go to your settings and click on the points tab on the LingQ desktop app.