Your portfolio demonstrates your understanding and competancy in a set of Knowledge, Skills and Behaviours.
You will map KSBs to your evidence to ensure you've covered every one of these and to help the assessor identify what you might talk about in your professional discussion. This mapping document is submitted alongside your portfolio when you enter Gateway.
In this document, list every Portfolio KSB and document where in your evidence you've met that KSB with reference to page or section numbers.