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The glossary below defines common terms regarding profiles and properties in Klaviyo.
Learn about the source ($source) profile property to better understand how your subscribers signed up. Klaviyo automatically assigns a $source property for profiles added using certain methods. For example, a profile’s $source is set to API if they were added through Klaviyo’s API, or set to Manually Initiated if you added them manually.
Learn about profiles, including how to find them and the data available on the profile page. Profiles are used to keep track of all the information you have about your customers and prospects.
Learn about active email profiles, including how they differ from suppressed email profiles, and how you can contact the people represented by these profiles.
Learn about the difference between custom and Klaviyo properties, how to use them to track information about your subscribers, how to remove them, best practices, and more.