How to read the referrer list

The referrer list is the part of the statistics that looks the most like insight and misleads the most reliably. It is a list of the places people came from. Reading it correctly takes about two minutes of knowing what it is not.

What is recorded

The domain only. Not the page, not the full link, not whatever a campaign or a search engine appended to the end of it.

That is a deliberate limit and it is the same trade made everywhere else here — but it is a limit on the reader as well. The list reports that a forum sent 300 people. It does not report which thread. That part has to be found by hand.

And a visit with no referrer at all produces no row. Somebody arriving from a mail client, a chat app, a PDF, or a browser configured not to send referrers is not "direct traffic" in the list — they are simply absent from it.

Trap one: a big domain is not a big fan

Across every counter on this site, the most common referrer domain appears in the lists of 479 different websites. It is not the case that one platform is enthusiastically linking to 479 people. It is a platform where a lot of pages live, each with its own counter, each recording its own host as the place its visitors came from.

The second most common is a search engine, appearing for 130 sites, which is what a search engine ought to look like.

The general rule: a domain that shows up for everybody is infrastructure. A domain that shows up for one site alone is a link.

Trap two: one row is not a trend

Of the 564 distinct domains recorded here, 474 appear for exactly one site. That is the normal shape of a referrer list: mostly single relationships. One forum, one directory, one friend's blogroll.

This is worth internalising before any conclusions get drawn from a list of ten domains with small numbers next to them. That is not a traffic mix. It is ten separate one-off events that happen to be printed in the same table.

Trap three: the site's own domain is in there

Some of the rows are the site's own domain. That is not visitors arriving — it is people already on the site moving from one page to another, with the previous page reported as the referrer.

It is easy to miss because it usually sits near the top, and it inflates exactly the number people most want to see go up. The site's own domain is best set aside before the rest of the list is read.

What the list is actually good for

One thing, mainly, and it is worth the whole feature: noticing that somebody linked in, while it is still happening.

A domain that was not there last week and is now near the top is a live link with people coming through it. That is the window in which the thread can still be found, the question about the project answered, the person who posted it thanked, or a follow-up published while anyone is still paying attention.

A week later it is a row in a table. The referrer list is not a report to be read at leisure — it is closer to a doorbell.