Viewster SSP came to us when their connected DSPs had the bid rate lower than the industry average As a result, this led to an unbalanced revenue-to-cost ratio for the client. After a careful audit, we determined the root cause in buyers receiving irrelevant traffic they never bid on. To solve the problem, we designed and developed sophisticated dynamic pretargeting functionality that filtered out irrelevant traffic for DSPs in advance, and subsequently raised the bid by 3.7 times.