> For the complete documentation index, see [llms.txt](https://help.impact.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.impact.com/brand/zh/what-would-you-like-to-learn-about/platform-features/tracking/set-up-tracking/using-the-referring-url-parameter.md).
# 使用引荐 URL 参数
参加 PXA 课程
引荐 URL 是 [HTTP 引荐来源](https://en.wikipedia.org/wiki/HTTP_referer) impact.com 会在点击发生时从用户的浏览器中记录该值，它是判断流量从何处进入您网站的一个良好指标。但是，作为跟踪来源，它并非 100% 可信或可靠，因为它在很大程度上取决于点击是如何发生的或链接是如何打开的。许多因素都会影响哪些内容会作为引荐 URL 发送给 impact.com。
#### 影响引荐 URL 可靠性的因素
如果您在 [*按引荐域名划分的效果*](https://app.impact.com/secure/advertiser/engage/additionalreports/report/viewReport.report?id=5243) 报表中看到“无引荐域名”状态，并且在 *域名* 列中，这通常意味着由于以下任一原因，没有可用的引荐 URL 信息：
* 用户手动在浏览器地址栏中输入了网站 URL。
* 用户通过浏览器保存的书签访问了该网站。
* 用户将该网站作为新窗口或标签页中的第一个页面打开，例如通过右键单击链接。
* 用户在外部应用程序中点击了链接。
* 用户从安全协议（https）切换到了非安全协议（http）。
* 用户从安全 URL（https）切换到了完全不同的安全 URL（https）。
* 用户可能安装了安全软件（防病毒软件、防火墙等），该软件会从所有请求中剥离引荐来源。
* 用户位于会从所有请求中剥离引荐来源的代理服务器之后。
* 用户以程序方式访问了该网站，但未设置 referrer 标头（使用搜索机器人）。
* 某些浏览器的隐私政策限制访问，以防止 `HTTP_REFERER` 被传递。
* 用户安装了出于隐私原因而阻止它的浏览器附加组件或扩展程序。
{% hint style="info" %}
**注意：** impact.com 建议您在确定向合作伙伴支付款项时，不要在支付组中使用引荐 URL 选项，也不要过度依赖引荐 URL 作为决策的数据来源。
{% endhint %}
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://help.impact.com/brand/zh/what-would-you-like-to-learn-about/platform-features/tracking/set-up-tracking/using-the-referring-url-parameter.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
