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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Liquidouz has a point. There is not information in the description for someone new to programming that provides any form of suggestion or hints on how to approach this