Boosting
Boosting is a merchandising technique that manually raises specific products higher in search or category results — for example, to promote a new arrival or high-margin item — independent of their computed relevance score.
Part of Merchandising
Boosts are usually set as rules by a merchant (always show this product in the top 5 for a given category) rather than calculated automatically, which distinguishes boosting from personalization, where ranking changes automatically per shopper.