X-Pert Bikes sells bikes for people of all ages.

X-Pert Bikes sells bikes for people of all ages. The company is creating a new advertising campaign targeted only at existing customers, encouraging them to buy an X-Pert Bike the next time they want a bike. The company also begins an X-Pert Club for existing users of X-Pert Bikes, as research has shown that familiarity with a brand increases the chances of repeat purchases. In this case, X-Pert's campaign is aiming to build ______.