Casting rods are built for baitcastingreels, that you mount on top of the rod. During the last few years the development of new castingrods has improved with high quality components to give you better precision and casting length. With a baitcasting set-up you normally have better control than with spinning gear, since you can control the length and your casts with your thumb and many options on your reel.
Normally you use baitcasting gear when fishing for heavier pike fishing (or bass/muskie fishing in the US). But the last few years more people have come to use it also for lighter fishing for perch and zander. It's a fun way of improving your skills. If you need any help with what rod to choose, we are in the chat bubble to the right! We have a great beginners set for pike fishing here.