> For the complete documentation index, see [llms.txt](https://helps.ptengine.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helps.ptengine.com/en/experience/setting/user-identification.md).

# User Identification Feature Overview

> **SUCCESS**
>
> **User Identification**
>
> User Identification is a powerful feature of Ptengine Experience that enables you to capture and leverage custom user attribute data.
>
> By utilizing this feature, you can deepen your understanding of users and develop more effective marketing strategies.
>
> 🔒 Note: You must respect user privacy and handle data appropriately.

## Benefits 💡

Link anonymous users with identified users Anonymous user ID (device ID)

```
Identified user ID (e.g., login account ID)
```

Accurate user behavior tracking

Detailed user segmentation

Delivery of personalized content

## Specific Use Cases 🚀

Converting anonymous users to identified users

Collecting attributes of identified users

### Attributes Collected by Default

Last active date

Registration date

Total number of sessions

Referrer domain at first visit

Referrer URL at first visit

### Uploading Custom Attributes

Name

Phone number

Gender

Age

Interests

Member tier

Other CRM or database information

📊 By integrating online and offline data, you can build more detailed user profiles.

## Usage Examples 🌟

Using on sites with login functionality:

User identification using unique IDs

Approach by user segment

```
Anonymous users: Login incentive campaigns

Identified users: Delivery of personalized information
```