Portfolio
A portfolio is an essential tool for a model to gain professional work. It is a collection of professionally shot images that is ultimately your visual modeling CV used to advertise your skills and abilities in front of the camera.
Although professional images are not needed to apply to agencies a portfolio is something that they will need to market you in the future and you can use to market yourself to freelance opportunities. It is almost impossible to be put forward for or apply to castings without one, as agents and casting directors will want to see that you have the confidence, experience and natural ability in front of the camera before offering you paid work.