Entrance and Exit Counseling are requirements for anyone taking out a federal student loan. Even if you've had one before, then you are required to do it again.
The purpose of Entrance and Exit Counseling is so that you understand how your loans work before you run into a problem. Entrance Counseling is required for your loan to even go through at the beginning of your loan. This is because you still have time to decide not to take out the loan if you understand the loan better in the Entrance Counseling process and decide you don't want it. Exit Counseling is required before you graduate from your program because you should know what to expect before you are out in the real world. If you drop from your program, Exit Counseling is still a requirement for you to complete.
Many schools allow you to complete Entrance and Exit Counseling online. Some schools choose to do Entrance and Exit Counseling in person as a group. The purpose of this is to allow people to ask questions instead of just clicking buttons without actually reading or understanding your loans. Either way that it's done, it's still required. Many schools even require you complete exit counseling in order to graduate. So, it's important that you do that.