Campaign Analytics – Which Tactic Gets Credit?

by DigitalAlex on January 15, 2008

black and white sneakersDo you know how your marketing campaigns are performing?

It’s likely that your web analytics tool could be under or over-reporting the true performance of your advertising.

The culprit? Attribution.

Attribution – Which Tactic Gets Credit?

The easiest way to understand campaign attribution is to think about a fictional prospect, Joe.

Joe searches for “black and white sneakers” and he clicks on your paid search ad. Nothing catches his eye, but he signs up for your email newsletter.

Next week, he gets your newsletter and clicks on the “Sale sneakers” section. A pair of Onitsuka Tigers catches his eyes, so he does a little price comparison research.

Seeing that you have the best price on Shopzilla, Joe clicks your listing and buys.

Joe hit 3 different campaigns while shopping: paid search ads, email and a comparison shopping engine. So, which one gets credit for the sale?

Well, it depends.

4 Types of Attribution

Depending on your web analytics program and the options you select, your campaign analytics could be measured in one of four ways:

  1. First - In this case, no matter how many campaigns the user clicks on, the sale is attributed to the first one they click. In Joe’s case, the paid search ad for “black and white sneakers” would get the credit.
  2. Last - Though those other PPC or CSEs may have pitched in, here only the last tactic gets credit for the sale. In Joe’s case, Shopzilla wins.
  3. Even Distribution – All of the campaigns get the same credit for participating in the sale, regardless of which one(s) had more or less influence.
  4. Smart Weighting – This type of attribution is similar to even in that all tactics do (or can) share in the credit, but the distribution is uneven. Instead, it depends on the relative influence of the tactic.

The first step to understanding how attribution affects your measurement is to ask your web analytics vendor which type they use.

For example, Google Analytics attributes results to the last campaign. Knowing this reminds you that you have to be careful with your tagging.

If you use campaign tags for other elements on your site, say you want to determine the value of a particular image on your homepage without testing, you could see a drop in your results.

In the case of Google Analytics, you can use the nooverride tag to switch attribution from last to first campaigns. Remember, you must tag all of your campaigns.

Making Peace With Attribution

Now that you’re aware of the issue of attribution and know how it might be hindering the analysis of your campaigns, you have to decide what you’re going to do about it. I recommend three steps to start:

1. Address Tagging Issues – As I noted in my Google Analytics examples, the particular way your program handles campaign attribution may mean you have to change some of your campaign or site tagging so as not to throw any numbers off.

2. Pick Your Source and Stick To It – Different programs handle attribution is unique ways. Take Google’s AdWords conversion tracking, for example–it doesn’t see your other tactics, so it will take all of the credit for the sale (you can do some additional tagging to get around this).

Figure out the source that you’re business is most comfortable with and optimize from that.

3. Chart Trends from Multiple Sources – Once you’ve picked your favorite data source, you still need to validate data quality on a regular basis (quarterly or monthly).

Compare one report against the other and look for odd trends.

  • Does one report show paid search going up 10% each month and another down 15%?
  • Are the raw numbers within some reasonable threshold (say, 5-10%) or are they way off (20%+)?

No set of metrics will be perfect, but they should be generally going in the same direction.

How are you accounting for attribution with your campaign analysis and optimization?

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1 BJ Wright January 15, 2008 at 3:13 pm

Alex,

I started out my day searching for this exact post! Thanks for the easy find. As before I have some more questions:

1. Which of the 4 types of Attribution have you found to be the most effective? Which should I use on my websites?
2. What analytic programs use attribution method 3 or 4? Is there a hack to get Google Analytics to report this way?
3. a.”Pick Your Source and Stick To It”: What is the additional tagging to get around this? Do you have a reference where we could start?
b. Does the Adwords conversion code still credit itself if the person returns through a tagged URL by email and makes a purchase? Meaning this sale would be credited 2 different ways within Adwords & Analytics?
c. How many days out does the Adwords conversion code track? If the person returns 45 days later and makes a purchase will it be credited back to the original ad?

I hope you don’t mind the additional questions? Thanks for the great resource.

BJ Wright

2 DigitalAlex January 15, 2008 at 5:08 pm

Hi BJ,

Thanks for the comment. I’m glad this was a timely post.

1.) Mostly, you’ll be limited to what your tool lets you do. It’s a bummer, but a fact of life.
2.) I know Omniture does three and GA can do 1 or 2. I used to use WebTrends, but I’m not sure what the new version (8) lets you do. You’ll have to poke around.
3.)
a.) I’m specifically referencing options you have with Google AdWords tracking that will let you see conversion from other non-AdWords campaigns within its interface. The AdWords help documentation has full details about destination URLs.
b.) I don’t know off the top of my head whether AdWords attributes through 1, 2, 3, 4 as I generally rely upon site-side analytics (to avoid this very problem)
c.) Again, I’m not sure of the cookie length, as it varies from vendor to vendor. The industry standard is 30 days, but I’ve seen them up to 90. Check the help documentation for a specific answer or ask your AdWords account manager.

I hope that helps!
-Alex

3 BJ Wright January 15, 2008 at 5:17 pm

Alex,

Thanks for following up. You answered my questions for the day!

BJ Wright

4 Daisy February 3, 2008 at 5:15 am

Hi Alex. Thanks so much for the insightful post. I am really interested in how Omniture and Google Analytics could let me do this. I ever used WebTrends but more used to Omniture, however, they have something in common. I have sent you an email. Look forward to discussing more with you on this.

Daisy

5 DigitalAlex February 4, 2008 at 10:05 am

Hi Daisy,

I’m glad you found the post useful.

By default, Google Analytics uses “last” attribution. You can change that. Here’s more info: http://www.google.com/support/googleanalytics/bin/answer.py?answer=55556&topic=10999

Omniture let’s you pick. You can set it to share credit among tactics. Craig has more about that and attribution in general:
http://www.blogs.commerce360.com/2008/01/are-your-ppc-reports-wrong-let-me-count-the-ways/

HTH,
-Alex

6 Matt Lillig January 26, 2009 at 8:20 pm

Hi Alex,

Great post. Glad to see that more people are starting to write about attribution models. It’s a hot topic and I hope it stays that way.

Here at Yahoo! we simply give those contributing ads/campaigns an Assist. We then give the last ad/campaign clicked before a conversion, a Conversion.

So for example, if you’re using Yahoo’s Full Analytics solution (found free in Yahoo advertisers’ search accounts) and you’re tracking display ads and search ads for example, you will see Assists attributed to ads or keywords that contribute to the conversion of your other ads or keywords.

So for example, if a visitor originally clicks on a display (that’s being tracked with Yahoo’s Full Analytics) and then later converts off a Yahoo search ad (also being tracked by Yahoo Full Analytics), then the display ad will receive an Assist and the search campaign will receive the Conversions.

Now, as an advertiser, I know that my display ads are helping to drive conversions to my other ads/campaigns.

Assists are extremely helpful when it comes to budgeting for display campaigns or bidding ons earch keywords. Here’s why….

Most people only look at the direct response of the ad or campaign when making budgeting decisions (basically just looking at conversions). No attribution view is being factored in. But with Assists, the attribution view is opened. For example…

Normally I made have dumped a display campaign because it didn’t convert well on its own. But once I factor in Assists, I may see that while the display ad was not converting well on it’s own, it was very valuable at driving conversions for my other ads (such as search). This happens a lot!

Same with search. I may lower the bid on a keword because it didn’t convert well on its own. Using Assists though, I find out that the keyword was driving conversion for my other keywords. Now rather than loweing the bid or pausing the keyword, I continue to spend or raide the bid.

Simply put, Assists change teh way advertisers manage their online ad/campaign budgets.

For more info, check out:

http://mattlillig.blogspot.com/2008/12/yahoo-assistsput-money-back-into-your.html

and

http://www.ysmblog.com/blog/2008/11/03/measuring-search-and-display-for-success/

Regards,

Matt Lillig
Yahoo Search Analytics – Team Lead

7 Levi September 18, 2009 at 1:49 am

Hello Alex,

I read somewhere else that when a visitor returns back to a site (directly), that this does not overwrite the original referrer (in Google Analytics). So in other words the original referrer would get the credit for a conversion, etc.? Is this true or no? If so, would “Direct” traffic as a medium ever get credit for conversions or be part of the attribution model?

8 DigitalAlex September 18, 2009 at 7:45 am

Hi Levi,

My understanding is that Google Analytics only supports first or last click attribution. Can you provide a link to that article?

Thanks,
-Alex

9 Levi September 18, 2009 at 8:44 am

Here is the article:
http://www.epikone.com/blog/2006/11/10/how-does-google-analytics-track-conversion-referals/

This next one below is about bookmark visits, although the writer reiterates that direct visits do not use the last click attribution model, which then points to the above article.
http://www.epikone.com/blog/2009/05/20/how-google-analytics-tracks-bookmark-visits/

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