# Referrer Sites > **SUCCESS** > > **What is a Referrer Site?** > > Refers to traffic coming from sites other than search engines or social media. > > In Ptengine, you can check referrer site information in two ways: by "referrer URL" and by "hostname". ## **Data Viewable on the Referrer Sites Screen** The detailed content of referrer sites can be viewed in the following two formats. ### 1. Hostname Hostname displays the domain of the referrer site. Metrics for traffic acquisition, behavior, and conversions are displayed for each domain, and you can sort them in ascending or descending order by clicking the metric name. Details of displayed metrics: Visits, New Visitor Rate, Page Views, Average Time on Site, Bounce Rate, Conversions, Conversion Rate. From icon ①, you can drill down on a specific domain to view more details. ### 2. Referrer URL You can view the detailed URLs of each referrer site. Clicking icon ① opens the corresponding URL in a new tab. ## **Usage Tips** By analyzing the hostname metrics, you can understand which domains are effectively driving traffic and optimize your marketing strategy. By checking the referrer URLs, you can analyze how specific content is attracting traffic. --- # Agent Instructions: 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: ``` GET https://helps.ptengine.com/en/insight/data-center/traffic-referrer.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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.