This document discusses measuring success in digital marketing. It notes that digital marketing combines technology and social sciences to reach and convince consumers. It recommends simplifying strategies to track performance in the complex digital landscape. A four-step approach is outlined: 1) decide what to measure 2) measure what counts 3) understand customer journeys 4) optimize journeys by improving measures. An example company, MadeInAFreeWorld, is mentioned. Tools like paid ads, email, social media, and all-in-one platforms are listed that can help with measurement.