This document provides guidance on testing social media strategies through A/B testing and measuring key metrics like engagement, user acquisition, and sales. It recommends testing at different times of day and with different content types, creative elements, and calls to action. Once effective strategies are identified through testing, the document suggests increasing spending on those strategies, especially at key moments, to acquire more users and drive more engagement and sales. Case studies on successful social media ad campaigns achieving low costs per engagement are also presented.