Affinity marketing: This is an umbrella term for any marketing approach that extrapolates possible future purchases from past ones, e.g. Amazon’s customers who bought items like this also bought…’ recommendations.
The basic idea of affinity marketing is to connect two or more products/services together in the hope that customers who usually use one will also begin using the other. When jointly promoting each other’s products/services, companies often share in the profits and also enjoy expanded name recognition.