Let’s understand this with an example. When a student lands on our website via an affiliate link, a cookie will get saved on its device and browser. However, if due to some reason, they leave the website without completing the registration at that time but comes back to our website after a few days within the cookie period and completes the registration, then also your referral will work and commission will be generated against that sale. bitLabs affiliate program provide the cookie period of 30 days.