---
title: "What is the Device filter and where does it pull from?"
description: "Understand how device type is tracked and filtered in Knotch One."
url: https://help.knotch.com/en/articles/46-what-is-the-device-filter-and-where-does-it-pull-from
collection: "Filters & Custom Views"
updated: 2025-07-09
language: en
---

# What is the Device filter and where does it pull from?

Understand how device type is tracked and filtered in Knotch One.

The **Device** filter allows you to view analytics based on how users access your content—by desktop or mobile.

Knotch One identifies the device by reading the **user agent string** from the visitor’s browser session. This string provides information about the device type being used.

Filtering by device helps you:

-   See how performance varies across screen types
    
-   Identify whether mobile or desktop audiences are engaging differently
    
-   Optimize content for the formats your users prefer
    

This filter is available in sections like Pages, Tags, Conversions, and Actions.