# User profiles

Learn the key concepts about user profiles.

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Use the summary below to quickly jump to a specific topic:

- [User profiles](/explanation/user-profiles/introduction): Get visibility into the visitors of your applications.
- [Filters](/explanation/user-profiles/filters): Learn how to filter user profiles.
- [Timeline](/explanation/user-profiles/timeline): Understand how users behave across sessions.
- [Attributes](/explanation/user-profiles/attributes): Explore each user's profile information.
- [Identity resolution](/explanation/user-profiles/identity-resolution): Connect separate profiles and keep their data in sync.