CFD is a course that gives you the training hours necessary for an ICF credential at Associate Certified Coach (ACC) level.
You can find the details of what you need and how to apply on the ICF website:
https://coachingfederation.org/credentials-and-standards/credentials-paths/acc-credential
Please note that CFD leads to the Accredited Coach Specific Training Hours (ACSTH) pathway. Once you have your CFD certificate, you will need to complete the other aspects as below:
"The other aspects – mentor coaching and a recorded coaching session for the performance evaluation – need to be verified separately and included in the credential application, along with the program certificate(s) and coaching experience hours. Once the application review process is complete, you will then take the ICF Credentialing Exam."