> 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/start-guide/quick/data-collection.md).
# Data Collection
In this section, we will explain how Ptengine collects data and what data Ptengine gathers.\
We will also address data security concerns.
### Ptengine's Data Collection
Ptengine's data collection is implemented through a simple code snippet. For details, refer to the basic code setup guide. The mechanism can be understood as shown in the following diagram:
### Ptengine's Data Dimensions
Ptengine's data collection can be broadly divided into three dimensions:
* Session-level data: Metrics include code-based events and visual events.
* Page-level data: Ptengine parses page packets to obtain user device information, geographic information, and more.
* User-level data: Includes user interaction behavior on the page, cookies, device ID, and performance data.
### Ptengine's Data Security
* Data theft prevention: Our dedicated operations team ensures that our data is not stolen or accessed externally.
* Data storage: Ptengine uses a distributed database to ensure data stability.
* Data leak prevention: We ensure that each customer's information is never disclosed to any third party.