Plungers are plumbing tools used to clear clogs in drains and toilets by creating suction to dislodge debris. Plungers come in various types, including cup plungers for sinks and bell-shaped plungers for toilets. The suction and pressure from the plunger help break up clogs, allowing water to flow freely again. Shopping for plungers online offers a selection of styles and sizes to suit different plumbing needs and ensure that you can tackle blockages effectively.