Nov 232009

PPC: The Syndication Networks

My monthly column at Search Engine Land, in case you missed it.

A few years ago, I wrote a blog post referring to the syndication networks as "Sin-dication". I'm trying to be nicer these days as a tribute to Alan.

FACT: The quality of traffic coming from the engine itself is of significantly higher quality than the traffic coming from their syndicate networks.

This has two important consequences:

  1. Bidding the same for traffic on the Google syndication networks as on leaves opportunity on the table.
  2. By not allowing advertisers to differentiate bids based on the quality of traffic driven by each network partner, Yahoo and Google lose money as do the advertisers.


Let's take some basic paid search principles and show how they apply to the syndicate partners. I'm going to make some simplifying assumptions to prevent us from getting mired in detail and missing the bigger picture.

The value of traffic in paid search varies terrifically by the user's search and the ad it fires. Since we can't really bid based on user search, let's see what that looks like as a function of keyword:

Cool! Now let's say the advertiser is willing to put 80% of the true value of the paid search income back into the marketing to drive the top line but still make some immediate profit.

Ideally, the bids would look like this:

By matching the bids to the value of the traffic on each KW we generate as much traffic as we can afford from each KW, thereby maximizing revenue within our efficiency requirements.

There is, however, another way to achieve the efficiency objective. Namely, by bidding to the average value of the collection of KWs.

In this simplest of models, assuming that the underbidding and overbidding don't move the average value of the traffic -- a big assumption and probably never the case -- you still end up spending 80% of the paid search income on marketing, which was the target all along.

So if either way you hit the desired efficiency target, what's the difference?

Volume. By wasting money on some terms, and missing opportunities for more sales on others, the poor bidding methodology hits its efficiency objectives but does so at the expense of sales volume.

Importantly: lower sales volume at the same efficiency by definition means lower advertising revenues for the engines.


So, if what we've learned is that applying the same bids to traffic of varying quality leads to fewer sales/leads for the advertiser and less revenue for the engines how does that effect our view of the syndicate partners?

Let's look at some data. I grabbed data from a handful of our clients and took median values by referring domain for click volume, and order volume as a percentage of the total traffic for each client. I also calculated median values for how each domain's conversion rate compared to the average conversion rate for that ad network. The comparative conversion rate data is most interesting.

{Note: sites are ranked from left to right in descending order of traffic volume for the median client}

Notice that traffic from, AOL, Amazon, and Comcast tend to send much higher than average quality traffic: 16 - 20% better than average. At the same time, eBay, Ask and the Comparison Shopping Engines, tend to send significantly lower than average quality traffic.

For Adwords advertisers can and should bid differently on the domain and the rest of the network. Looking at these medians as if they were one advertiser's data, we'd end up bidding the version of the account up by 16% and the + syndication network version of the account down by 33% ( traffic is slightly more than 2/3 of the total, hence the disparity).

My sources tell me we're among the very few folks in the space doing this, which is surprising as we've been doing it and advocating it to others for more than two and a half years.

This two-tier approach will help materially, but is in no way ideal bidding. In this, we end up underbidding on AOL and Amazon traffic, and still overbid on eBay, Ask and others. Better, but not great.

If we take a look at the same type of data from the Yahoo network we see even greater disparities. traffic is 35% better than the average Yahoo ad network traffic!!! The rest of the network averages ~ 42% below the aggregate average! But, even among those there are winners and losers.

Yahoo does not give us the opportunity to bid differently on the network, but does give us the opportunity to exclude traffic from particular domains. Given the lower traffic volume on Yahoo, it can be difficult to separate signal from noise to identify those domains that send particularly low quality traffic. Sometimes looking across multiple accounts helps us spot trends that we can't really see looking at a single account's data.

But excluding sites isn't really what we're after either. In most cases the traffic isn't worth nothing, it's just worth less. Paying the right amount for it would allow us to generate sales cost effectively from each domain in the syndicate network and most importantly, would allow us to push the gas harder on the high quality traffic provided by some.

Both Google and Yahoo claim to discount the CPCs from network partners, but our experience suggests the discounts aren't adequate. Moreover, since any good bidding system bases bids on expected revenues, rather than sunk costs, the discounted CPCs wouldn't solve the problem even if they were right. The bids might be right for the bad performers because of the discounts, but we'd still under bid on the higher quality traffic.

The obvious best solution for the advertisers and the engines is to allow us to bid differently by domains. Creating separate campaigns for each domain might be too much to manage, but account level percentage adjustments based on each advertisers data would be easy.

Perhaps the hang up is the publishers. If eBay's revenue as a syndicate partner dropped by 40% they might use that space for display ads rather than search, and perhaps they'd rent that space through a non-Google exchange. Legacy revenue sharing agreements between the engines and the network partners may also be a barrier.

Whatever the case, we at RKG would like to have more control over what we pay for the traffic we get from the syndicate partners. We hope you folks will join us in this call!


15 Responses to "PPC: The Syndication Networks"
Kenny says:
Amen, George. One of my top requests when talking to the engines.
Josh says:
George, you say "For Adwords advertisers can and should bid differently on the domain and the rest of the network.". I take it you're referring to search vs content network, since advertisers cannot place different bids on Google vs Search Partners (eBay, Ask, AOL, Netscape, Dogpile, etc.)
Kenny, thanks for your comment, glad to have you on board. Josh, apologies for not being more clear. We're not talking about content. Google doesn't make it easy or intuitive how to bid separately on from the network, but here's how we do it: One set of campaigns is set to Google-only. A carbon-copy of those campaigns is set to Google + Syndication Network. The bids for the Google-only campaign are higher because the conversion rates are higher, hence on only the Google-only campaigns are in play. That means that the Google + Syndication partner campaigns actually only serve ads on the syndication network and the bids can be depressed en masse for that traffic. This is a good first step, but as I mentioned, doesn't allow us to differentiate between domains within the network.
Jim Novo says:
In the Lab Store setup we underbid on Google Syndication by about 40% (using mirror campaigns, as you explained above), so tracking in the ballpark with you. Started doing this in Aug 2007 because the syndication traffic was low quality and prone to bizzare movements - looked like some games being played ;) I'm sure it's not perfect and we miss some (largely non-profitable) sales but I just can't shake the "yield" habit, if you know what I mean...
Jim, we're cut from the same cloth. Return on investment is a tough habit to shake :-) We're essentially asking Google to give us some "Advanced" options akin to the "Advanced" tab in the setup screens for many software packages. If you don't know what you're doing you're better off not opening that tab, but if you DO know what you're doing those additional controls can make a material difference.
Social comments and analytics for this post... This post was mentioned on Twitter by RBeale: #PPC: The Syndication Networks
While I skimmed this post, I thought I'd share my own experience with the sin-dication junk. My first ever PPC campaign used the same ads and bids on both search network and Google. That got me the same average position. Yet my CTR was 3x higher on the network. It's called theft, and it's illegal.
Curtis says:
Great study George! Along the same lines, I'm trying to find a study about which search engines have the highest conversion ratios. Would you have an idea where to find that information? I'm trying to determine who has better conversions - Google, Yahoo, or Bing. Any ideas would be greatly appreciated! Thanks again for this amazing post. I learned alot from it!


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