Thanks so much, will try this now.

Hi,

My site traffic halved overnight. But I have no manual penalty in GSC.

How long does it normally take for a penalty to show up? Or should it already be there?

The only thing I have done on the site recently is add some more affiliate links (this is not core to our business, more of a side hustle), I haven't declared any of the affiliate links to Google as I read you don't really need to: https://www.searchenginejournal.com/google-penalty-affiliate-links/429907/

Can you get penalise for this?

Any help would be greatly appreciated.