How to create an interest-based feed ranking algorithm?

Question

Algorithms

Information
• this algorithm ranks products on the marketplace
• based on the snag of the whole process that these are products, not news

The ranking algorithm is ready with the exception of two parameters
• distribution of the number of blocks in the layout for a specific interest
• order of display in the feed with several interests

What you want
• a link to a similar solution for an example
• a link to similar articles
• thanks in advance =)

Answer 1

intsysjournal.org/pdfs/21-4/18-30-Kutanin.pdf
+ there are 2-3 books in Russian about "recommender systems", the
task is not easy, the solution is creative,
do it as it is - hang metrics - put AB tests - change approaches