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A neural network needs to be trained with curated datasets. You feed a lot of those into it, and the more it gets the better it can categorize future content by itself.
This will allow users to define a fixed set of interests to start with, but it's only one of the angles we're taking. For example, users of the dedicated platform will be able to opt in to tracking their behavior which lets us refine the results.

okay - so the categorizing help is only needed for the beginning?
to help the AI start?

thanks :)

Yes. It might need to be refined later, but most of the work is getting things started.