Rules in GlobalForms offer the ability to apply custom logic to your form's components.  They can be as simple as showing or hiding a component based on specific values in other components, or as complicated as integrating with a 3rd party mapping API to get a distance between two addresses.  Anything but the most basic rules requires some level of JavaScript knowledge.  The examples listed here are intended to serve as a starting point for some of the more common tasks customers look to achieve with Rules.