Referers

The Referer tab aggregates data from the log file for every Referer discovered, based upon the chosen time period, user-agent(s) and project type (‘Bot only’, or ‘All’). The Referer comes from the Referer header field in the HTTP request. It identifies the web page that linked to the page being requested. Referer is not a mandatory field, so it maybe that this was not included in your imported log files and this tab has little value to you. If the imported log files did have Referer information in them, it will very probably not be included in every event as it’s an optional field. Depending on log file type the Referer will either be shown as empty or “-” when missing. Log events from search engines, or users visiting pages directly will typically not have any Referer information in them.

The summarised data includes the following –

• Referer – The referer URL of the event.
• Unique URLs – The number of unique URLs with the referer.
• Num Events – The total number of events for the referer.
• Total Bytes – The total bytes downloaded of all log events for the URL.
• Average Bytes – The average size in bytes of all log events for the URL.
• Total CO2 (mg) – The total CO2 in mg of all log events for the URL.
• Average CO2 (mg) – The average CO2 in mg of all log events for the URL.
• Average Response Time (ms) – The length of time taken (measured in milliseconds) to download URLs on average for the referer.
• Errors – The number of events with errors (4XX or 5XX responses).
• 1XX – The total number of 1XX events for the referer.
• 2XX – The total number of 2XX events for the referer.
• 3XX – The total number of 3XX events for the referer.
• 4XX – The total number of 4XX events for the referer.
• 5XX – The total number of 5XX events for the referer.