The portfolio tells the client who you know, what you’ve done, what you can do, and just how versatile you can be when put in the spotlight. Since they loved your comp card, they are going to hope to see more amazing footage in your book. Models who don’t have a lot of experience can test with photographers to build their experience and diversity of the images. However, the experienced eye sees an obvious difference between a model’s book which has been built by testing and a model’s book which has been built with work itself.
The look and size of portfolios can vary from decade to decade and market to market. Seek advice from your agent about the best choices before investing in a book. You agent may also request a second copy be kept in their office to overnight out as clients request. A lot of agencies are relying more on using online resources for books, as clients become more open to electronic communication.
How far you make it in the process generally speaking can tell you a lot about the effectiveness of your materials. Competition is fierce, so if you are making it to the final go-see (also called a “look-see” in some markets) you can rest assured your materials are high quality.