LOS ANGELES--(BUSINESS WIRE)--Zefr, a leader in AI-powered responsibility across walled gardens, today announced the launch of Opti, a new solution designed to help brands maintain control over media costs while maximizing the performance of YouTube Demand Gen and Performance Max campaigns. Opti arrives ahead of YouTube’s August 17 changes to target bid optimization. It is designed to help advertisers running lower-funnel and conversion-focused campaigns minimize potential bidding friction and