This article provides a step-by-step guide on how to remove a drain stopper from a bathroom sink. It covers the use of pliers or a wrench to loosen the drain stopper, unscrewing the pop-up lever to remove it, using a screwdriver or Allen wrench to take it out, pulling out the hair and debris that is clogging it, using a plunger to disconnect it, applying heat to loosen it, and using a drain claw to remove it.