How the Netflix algorithm works
You use the Netflix website to rate films that you have seen on a scale from 1 = hated to 5 = loved.
The Netflix algorithm compares your film ratings against other Netflix customers in order to calculate a predicted rating for every film in their database.
This enables Netflix to suggest
The Netflix "algorithm" works by calculating a predicted rating for every film in their database based on how you and other Netflix customers have rated the films you have already seen.
Having a "predicted rating" makes it much easier for you to find films you would enjoy watching.