# Concepts

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Contacts</strong></td><td>Learn about the data we store about contacts.</td><td></td><td><a href="concepts/contacts">contacts</a></td></tr><tr><td><strong>Profiles</strong></td><td>See what's stored on an individual contact profile.</td><td></td><td><a href="concepts/contact-profiles">contact-profiles</a></td></tr></tbody></table>