Marketers need to understand a variety of signals from data to become successful in search engine marketing. Alex Cohen tells us about 43 signals that answer six fundamental questions. He not only lists the signals, but defines each. Take "flat fee pricing," for example. Cohen explains how some ad formats, such as Media Ads, charge a flat fee for interactions. He also tells us why it's important to pay attention to behavioral and social interactions, along with when the target audience searches and on what types of devices.