How to categorize PAA articles automaticaly on Wordpress?

Hello,

I see many PAA sites on wordpress that manage to categorize their 50000+ articles automatically. (for example: health / technology / sport / [...] )

I would like to do the same but how to extract a category from a set of 10 related PAAs?

Do plugins exist for this? Or do they use AI to categorize the articles? Or something else?

Thanks and have a good day!

how do you scrape PAA results?

Directly from Google with a python bot