Implementing buying types and optimizing for ad delivery Credential Earned Meta Standard Award (English) Created with Sketch. 03/23/2022 Implementing buying types and optimizing for ad delivery Bảo Châu Lê Nguyên Implementing buying types and optimizing for ad delivery Completed by Bảo Châu Lê Nguyên on March 23, 2022 Completion ID: 78080869