There are basically two ways that you can desolder, which is the term we use for removing solder from a printed circuit board. Desoldering is necessary when a component on the circuit board must be removed, and you can use either a desoldering braid or a solder sucker.
The desoldering braid works by wicking up the solder. It's made of copper, and the liquid solder flows to it the same as the solder would flow to your contacts when making a connection. Most Solder Suckers work by using a plunger that generates a vacuum action to suck up the molten solder.
Because solder contains lead, the fumes from molten solder can be hazardous, so MPJA also offers Solder Fume and Smoke Absorbers - a must for any circuit board repair station.