Joinery is how two pieces of wood are connected, and it is one of the clearest signals of quality in any piece of woodworking, whether that is a cabinet box, a drawer, a table, or a door. Glue and fasteners can only do so much on their own. The shape of the joint itself is what determines how much strength, alignment, and longevity a piece will have long after the finish has worn in. Here is a rundown of the joinery methods you will run into most often, moving from the simplest and most common up to the most demanding and prized by fine woodworkers.