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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.
Good question. If this is an easy one, then I'm in deep trouble. :P
Is it the exclamation point that you don't understand? If so, look up factorial. n! = 1 x 2 x ... x n. E.g. 4! = 1 x 2 x 3 x 4 = 24.
@TenC you're fine, it also took me a long time to figure it out.
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