After your registration for the website is completed, you will receive a referral link. You find it on the website under referral bounty.
Share this link with the persons you want to refer. If they follow your link and buy UCT, you will automatically be credited with an amount of UCT equal to 5% of their purchase. You will receive your referral tokens as soon as the purchase of the person you referred ha been fully processed (payment & KYC).