Segments are groups of people with similar characteristics (demographic or academic interests, for example). They can also share similar interactions with Element451 modules, like clicking on a link in an email.
Segments allow you to learn more about your prospects, applicants, etc. They're also the backbone of how Element451 helps you personalize communications (emails, SMS messages), sites, pages, and other actions you can perform through the system.
Segments are created using filters. (more about filters here) You can create a segment for something as simple as people who have submitted an application or as detailed as people who have completed, but not yet submitted an application for a certain term during a defined time period.
When to Use Segments
You'll want to use segments whenever you want to tailor communications and content to a specific group of people, or when you need to pull data about different groups.