Sliding friction is the fricion produced when two solid objects slide over each other. It causes the most friction of the three types. This type of friction can be reduced by adding a lubricant. Doing this would make the friction become fluid friction, which produces much less friction. For example, if you slide a book across a surface, it wouldn't go very far.

Rolling fricion is produced when an object rolls over a surface. It produces less friction than sliding friction. Therefore, adding wheels to a chair would make it easier to push it across the surface.

Fluid friction is the friction produced when an object moves through a fluid. This can used to reduce friction on a sliding object, yet can also cause a great amount of friction, depending on the density of the fluid. For example, adding oil to reduce friction between the pistons and the cylinders in the engine of your car.