This document discusses strategies for improving a pay-per-click (PPC) advertising campaign for mortgage leads. It provides a case study showing how the cost per lead decreased over time from $68 to $23 as optimizations were made. Specific recommendations include separating search and display network campaigns, using precise match types and negative keywords, tight ad grouping themes, relevant landing pages, and regularly analyzing performance to optimize bids and ads. Continuous testing and optimization is emphasized to improve quality scores and lower costs.