> ## Documentation Index
> Fetch the complete documentation index at: https://docs.arnio.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Lists and segments

> Organize your audience with lists and dynamic segments.

# Lists and segments

Organize your audience into lists and dynamic segments for targeted messaging.

## Overview

Lists are static collections of contacts, while segments are dynamic groups that automatically update based on conditions.

## Create a segment

[See the full article →](/core-concepts/check-imessage-number)

1. Navigate to **Audience** > **Lists & segments**
2. Click **Create new** > **Create segment**
3. Enter a name for your segment and an optional description
4. In the **Segment definition** section, decide if the contacts should match "All" or "Any" of the specified conditions
5. Apply filters by attributes or condition groups for precise audience targeting
6. Utilize "and/or" filters to refine your selection further
7. Preview the matching contacts, and when satisfied, hit the **Save Segment** button

## Create a list

1. Navigate to **Audience** > **Lists & segments**
2. Click **Create new** > **Create list**
3. Enter a name for your list
4. Add contacts manually or import from a CSV file
5. Save your list

## Use cases

* **Segments**: Target customers based on behavior, demographics, or engagement
* **Lists**: Organize contacts for specific campaigns or events

**See also:**

* [Contacts →](/audience/contacts)
* [Contact activity →](/core-concepts/analytics)