Floor lamps tend to offer lighting in a corner or space of a room, and a single floor lamp will not usually provide adequate levels of lighting for an entire room. They are considered ambient lighting and are normally used near furniture to provide lighting for whoever sits in that chair. They are great for reading, can be used to enjoy lower lighting than is provided by the ceiling light, and they give a room a homely feel.
It is possible to coordinate a floor lamp with any table lamps that you have, and as well as traditional designs, you can choose from a large selection of modern and geometric style designs. There are also unique styles to choose from too.