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What is an HTTP referrer

From: SISTRIX Team Steve Paine 02.02.2021 Google-Index, Google-Bot and the Crawling Process What is the Google Everflux? Robots meta tag vs. robots.txt: what are the main differences? What is an HTTP referrer Our web site is no longer in the index - have we lost our rankings? What is a User-Agent? What is Google Search Console and How To Get Started Web Crawlers: How do They Work? Changing Google Search through Entities What is the X-Robots-Tag? What is the Mobile First Index? Rich Snippets: What are the advantages? Can the Google-Bot fill out and crawl forms? Crawl Budget: What does this mean? These are the CTR's For Various Types of Google Search Result Crawling and Indexing for extensive websites Google SERP Features: Result Types in the Search Results Why does the amount of indexed pages fluctuate so much? How can I quickly get a new page into Google's index? Why does a blocked, noindex URL show up in the search results? Is a website with and without the www harmful? Shelf space optimisation on Google Find out how many pages of a domain are indexed by Google The consequences of negative user-signals on Google's rankings Why am I getting different values for indexed pages in the Google search, the GSC and SISTRIX? How can I remove a URL on my website from the Google Index? Back to overviewWhen a website is visited by a user, the referrer gives an indication of the URL from which the visitor has arrived. The website operator can thus quickly and easily see the domains that users came from, e.g. Google.de.ContentsContentsWhat is a referrer Is it spelt referer or referrer When is no referrer transmitted What is the referral string Conclusion

What is a referrer

The referrer shows the URL of the page that the user visited before following a link to the current page. The referrer is stored by the server in the server logs and can be accessed there. In the following example we clicked on a link on the SISTRIX homepage. If we look at the server request (via Chrome Developer tools -> network) that was sent by the browser when the link is clicked, we can see the page which referred me to the site. Referer field in the request header.

Is it spelt referer or referrer

The correct spelling is referrer. In the RFC’s first version of the Hypertext Transfer Protocol (rfc1945), however, the wrong spelling, ‘referer’, crept in and was never corrected. Thus, in the official version, the spelling ‘referer’ is found. For this reason, the ‘referer’ spelling is still used by browsers today. To make matters even more confusing, a WebAPI with the name ‘document.referrer’ can be used to return the URI (Uniform Resource Identifier) of the page that provided the user with the link to the current page.

When is no referrer transmitted

It is quite possible that no referrer can be transmitted. This is the case, for example, when a user switches from an HTTPS page to an HTTP page. In this case, the no-referrer-when-downgrading Referrer Policy (which is again spelled grammatically correctly) applies by default. Also, no referrer is displayed if the URL was typed in by hand or if the website was accessed via a bookmark. In both cases, there is simply no originating website that acts as an intermediary.

What is the referral string

The referral string is used internally by Google for data collection and is no longer transmitted to websites, as was the case in the past. Nowadays, website operators only see whether a visitor comes from Google. Before a user arrives at the clicked website (let’s take www.sistrix.de as an example) from a Google result, Google uses the ping attribute during the click to store a number of pieces of information about the clicked link. This is a number of pieces of information that tell Google how the search was done and what result was clicked on. For example, if one clicks on the SISTRIX result in a Google search for SEO-Tool, the following information is stored by Google: Nowadays, the referral string is only used for Google’s data collection. In the past, Google transmitted further information about the referral string to website operators, but this is no longer the case. Nowadays, the referrer only contains the information that the visitor came from https://www.google.com/ (or .de/, etc.).

Conclusion

With the referrer, you have important information in your own server log files about the domains from which visitors came to your website and the pages they accessed within the website. As a website operator, you have many possibilities to control the information that is provided in the request header via the referrer policy. This can either be set via your own web servers, or often also via a Content-Delivery-Network (CDN). The referrer can play an important role in increasing and analysing the flow of visitors to a website via search engine optimisation (SEO). In order to do this, of course, you first have to be able to manipulate and interpret that data in a meaningful way.. From: SISTRIX Team Steve Paine 02.02.2021 Google-Index, Google-Bot and the Crawling Process What is the Google Everflux? Robots meta tag vs. robots.txt: what are the main differences? What is an HTTP referrer Our web site is no longer in the index - have we lost our rankings? What is a User-Agent? What is Google Search Console and How To Get Started Web Crawlers: How do They Work? Changing Google Search through Entities What is the X-Robots-Tag? What is the Mobile First Index? Rich Snippets: What are the advantages? Can the Google-Bot fill out and crawl forms? Crawl Budget: What does this mean? These are the CTR's For Various Types of Google Search Result Crawling and Indexing for extensive websites Google SERP Features: Result Types in the Search Results Why does the amount of indexed pages fluctuate so much? How can I quickly get a new page into Google's index? Why does a blocked, noindex URL show up in the search results? Is a website with and without the www harmful? Shelf space optimisation on Google Find out how many pages of a domain are indexed by Google The consequences of negative user-signals on Google's rankings Why am I getting different values for indexed pages in the Google search, the GSC and SISTRIX? How can I remove a URL on my website from the Google Index? Back to overview German English Spanish Italian French