We already discussed about the basic concepts and terms in Domain Driven Design (DDD), check out the Introduction post if you missed it. Also we explained which Layers compose the DDD architecture. Now let's see the artifacts we use to unify these concepts and build our application (with PHP example).
Goals measure how well your site or app fulfills your target objectives. A goal represents a completed activity, called a conversion, that contributes to the success of your business. Google Analytics goals are a way to capture interactions and allow reports to analyze behavioral, acquisition and demographic data against that information. When a visitor to your site or user of your app performs an action defined as a goal, Analytics records that as a conversion.