Yahoo Search Goes Secure, Taking Referrer Data — An Indicator Of Yahoo’s Popularity — With It


By default, searches on are now done through a secure server. That means more protection for searchers but less data for search marketers about how they are receiving traffic. Most visits from Yahoo done via search will appear as if someone came to a site directly. As a result, Yahoo’s apparent popularity as a traffic driving source will appear to plunge. Yahoo also has left a loophole to keep sending search data to advertisers.

Yahoo Makes Secure Search The Default is our story on Marketing Land with more details about the shift. In summary, it’s still rolling out and by March 31 of this year, all Yahoo search properties worldwide should be using secure search.

This article here on Search Engine Land will focus on the loss of referrer data and what that means for search marketers.

Google & Not Provided

Search marketers are long-used to the idea that they no longer get so much search term data because of Google’s move to secure search in October 2011 for signed-in users:

That ushered in the era of “Dark Google” where search terms were withheld:

Then last September, Google confirmed that it was moving all searches to secure by default, not just those who were signed-in to Google:

All of this has meant that the vast majority of searches done on Google, and which lead to a site, have the search terms removed or shown as “not provided” to those who make use of Google Analytics. Search marketers know a search happened on Google, but they don’t know what the exact term was.

Yahoo & No Referrers

So is Yahoo’s change going to cause a spike in “not provided.” No. That’s because Yahoo’s not sharing anything at all. In most cases, a search on Yahoo that leads to a publisher will reveal nothing — you won’t know the terms, nor will you even know the person came from Yahoo. It will seem as if they came directly to your site.

A similar thing happened with those making use of mobile Safari when searching on Google in 2012:

Data From Google But Not Yahoo?

How is it that Google secure search still lets you know someone came from Google but Yahoo secure search doesn’t? That’s because Google carefully constructed its secure search to actually make it less secure, to allow for general referrer information to pass (so you know an unnamed search happened on Google) and for actual search terms to pass for Google’s advertisers.

The stories below explain more about this in detail:

Potentially, Yahoo could make a similar change. But for the moment, the company says it has no comment about the issue, as the rollout isn’t complete.

As a result, Yahoo will likely see its popularity plunge in the stats used by publishers. It will be sending search traffic but not be credited for this. Of course, Yahoo’s real popularity has already plunged so much that many publishers probably don’t even pay much attention to the amount of search traffic it sends. But what little it does send is now going to appear a lot worse.

By the way, when it comes to searches that lead to secure servers, Yahoo appears to be following standard protocol and passing along full-referrers. However, as most sites are not secure sites, most publishers won’t receive this information.

Postscript: Yahoo tells us that in the case of ad clicks, as with Google, referrer data and search terms will continue to be passed along to advertisers over the web and in the clear.

What’s Up With Bing

Bing launched secure search this month, also, but it’s not on by default, as with Google and Yahoo. That means it will have very little impact on data being withheld. But if it goes on by default, as currently configured, it would act just like Yahoo and pass no data at all. Our story below has more:

The Rundown

So how’s the landscape look on who passes what and when? Like this:

  • Yahoo: secure search is the default, no referrers passed, except for advertisers
  • Google: secure search is the default, Google referrer passed but search terms stripped, except for advertisers
  • Bing: secure search is optional, no referrers passed

See also our Marketing Land story, Yahoo Makes Secure Search The Default.

Related Topics: Channel: Analytics | Legal: Privacy | Top News | Yahoo: Search


About The Author: is a Founding Editor of Search Engine Land. He’s a widely cited authority on search engines and search marketing issues who has covered the space since 1996. Danny also serves as Chief Content Officer for Third Door Media, which publishes Search Engine Land and produces the SMX: Search Marketing Expo conference series. He has a personal blog called Daggle (and keeps his disclosures page there). He can be found on Facebook, Google + and microblogs on Twitter as @dannysullivan.

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  • Gareth Mailer

    What is this Yahoo thing you speak of?

  • JB

    That’s cool. I was getting tired of having data anyway.

  • Christian Noel

    Typical Yahoo. I mean I can live with secure search. However, this business of tossing everything into “Direct” is ridiculous, Direct traffic to a site is a great way to gauge the brand strength of my company or my clients. Bookmarked pages, people who just know our brand and tap in the URL etc. Throwing this other data which quite frankly doesn’t belong in the “direct” channel (because it isn’t what it is) is incredibly disruptive. However, this kind off behavior by Yahoo/Google is typical of the utter contempt they have for OLM practitioners in general. They don’t need to treat OLM’s with any particular regard, they don’t have to. However, don’t mess up my statistical reporting which I use to benchmark plus/minus for my client by cross pollinating channels by default.

  • Li Ma

    Wow, this Yahoo (potentially Bing as well) secured search update makes the “Term Not Provided” changes from Google not a big issue anymore. If all the major search engines are going to follow the same path, I foresee a strong need for most websites to switch over to the secured protocol as the canonical version.

  • Danny Sullivan

    Going to a secure server will not get you the data from Google. It doesn’t pass along from secure to secure, as the standard recommends. It does it’s own thing.

  • Christian Griffith

    Sounds like a desperate move with no benefit. Rethink this one, Marissa.

  • Li Ma

    I didn’t make myself clear with the last comment. I was saying if all major search engines including Google are going to follow this complete “secured search” but still pass full referrer data to secure sites…

  • David E Carey

    Really well blow me over with a feather! To be quite frank and honest, in terms of it’s potential impact in my own market space, it is irrelevant If secure search is employed by Yahoo and Bing. I’ve now got use to Google “not provided”, stopped crying in my bucket and moved on. Anyway what is the average search volume in the US/UK for BING/YAHOO 4-6%? I’m not staying awake at night thinking about this.

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