This named cross-selling in scientific marketing, when somebody sell to customer related items, even far related. Best example, when You will buy auto, good se

This named cross-selling in scientific marketing, when somebody sell to customer related items, even far related. Best example, when You will buy auto, good seller will try to sell items for tourists, picnic items, spinning, and even bait (sure, will include regulated items in base, like insurance, fire-extinguisher).