Definition:
Referral or referral traffic is traffic that an analytics tool attributes to links on other websites. It occurs, for example, when someone follows a link in an article, review or directory and arrives at the website being analysed.
The source of the visit is usually identified through referrer information sent by the browser. Not all external traffic is referral traffic: organic search, advertising, email and social media may be classified as separate channels depending on the tool and tagging used.
The absence of a referrer does not prove that the person typed the URL. Applications, privacy settings, certain protocol changes and untagged links can prevent this information from being transmitted and cause a visit to be classified as direct traffic.
Table of contents
What referral analysis is used for
Referral analysis identifies the domains and pages that send visits, helps assess whether that traffic is relevant and reveals relationships, mentions or content that make the website easier to discover. In web analytics, this information can be compared with subsequent actions such as reading content, submitting a form or making a purchase.
A source with many sessions is not necessarily the most valuable. Interpretation should consider visit quality, conversions, the context of the link and possible anomalies, such as automated traffic or self-referrals caused by an incorrect configuration.
Referral describes an observed source, but it does not by itself establish which contact caused a conversion. That assessment depends on the attribution model and the information available throughout the user journey.
Examples of referral traffic from external websites
Editorial links and legitimate mentions can generate referral traffic. Common examples include:
- Related websites: A specialist publication links to a resource, study, product or service because it provides useful information for its readers.
- Forums and communities: A member shares a relevant link to answer a question or expand a discussion, without using it as repetitive promotion or spam.
- Reviews and directories: A business listing, comparison or review includes a link to the website it mentions.
- Editorial collaborations: A contributed article, interview or external contribution links to its author or a relevant source. Its purpose should be informative, not an exchange designed to manipulate search engines.
- Events and organisations: A conference, association or partner page links to participants, sponsors or cited resources.
Analysing these cases correctly requires checking the source page and the context of the link. Campaign parameters are also useful when a link is part of a controlled activity because they distinguish it from a spontaneous editorial mention.