> 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 在点击发生时会从用户的浏览器记录该值，它是判断流量来自您网站何处的一个很好的指标。不过，作为跟踪来源，它并非 100% 值得信赖或可靠，因为它在很大程度上取决于点击是如何发起的，或者链接是如何打开的。影响发送到 impact.com 作为引荐 URL 的内容的因素多种多样。
#### 影响引荐 URL 可靠性的因素
如果您在 [*按引荐域名的表现*](https://app.impact.com/secure/advertiser/engage/additionalreports/report/viewReport.report?id=5243) 报告中看到“无引荐域”状态的 *域名* 列，这通常意味着由于以下任一原因，当前没有可用的引荐 URL 信息：
* 用户在浏览器地址栏中手动输入了网站 URL。
* 用户通过浏览器保存的书签访问了该网站。
* 用户通过新窗口或新标签页打开该网站作为第一页，例如右键单击链接。
* 用户在外部应用程序中点击了一个链接。
* 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（杀毒软件、防火墙等），它会从所有请求中剥离引荐来源信息。
* 用户位于会从所有请求中剥离引荐来源信息的代理服务器之后。
* 用户以程序化方式访问了该网站，但未设置引荐来源头（例如搜索机器人）。
* 某些浏览器的隐私政策会限制访问，以防止 `HTTP_REFERER` 被传递。
* 用户安装了出于隐私原因阻止此功能的浏览器插件或扩展程序。
{% 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.