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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.
I believe this comment could have focused more on conciseness, especially when conveying a clear message to future solvers.
Please mention the language where you found that, and no, changing the description is not the way to go.