This document summarizes key points from an online marketing lecture that covered Pay-Per-Click (PPC) advertising, social media, and the ELM model. It discusses how PPC advertising works, including creating ads, selecting keywords, bidding, and optimizing campaigns. Social media strategies like engaging consumers, using rich content like video and photos, and labeling marketing messages are covered. The ELM model and using it for persuasion on Pinterest is briefly mentioned. Students are assigned to read about measuring Twitter and selecting Twitter applications for the next class.