Analytics, Where did you get these?
Posted by Jamie Hutson | Filed under Life, advertising, analytics, measurement
In a recent fit of analytic interpretation, I really started digging down into our different analytical programs. Google Analytics is the most comprehensive we have, we use two different programs based on log files, and several script based tools.
Going back a ways to a post by Darren Herman, Numbers Don’t Lie, Except When They Do, he touches on a very important point in the measurement of visitors, which set of data is accurate. While there have been recent reports on deleted cookies increasing measured visits, there have been opposite accounts of under reporting.
My recent experience here evolved from a conflict that was directly affecting my advertising budget - Adwords was not agreeing with Analytics. In the process of tracking which Adwords keywords were resulting in the deepest visits into my site, I discovered that while Adwords was sending X amount of clicks per day, analytics was reporting fewer. In one keyword, Adwords charged us for 57 clicks, while Analytics was only reporting 43. Now that is a major discrepancy. While the value of this is not huge (at $.17 CPC) but at a percentage of difference this is major. For one particular campaign Analytics reports 1,049 visits from that keyword over the course of March, Adwords is reporting 1,246. These aren’t showing up as bounces, or repeats, these are just clicks from Adwords. If I was dealing with 5700 versus 4300, now we are talking major dollars, and major pains.
So then I head over to my AdSense account, and of course page impressions are different again. Google has responded with a fairly ambiguous explanation of log files versus scripts and varying reporting methods, but nothing on their own methods and why they disagree, conveniently to my disadvantage. I am certain that if they noticed my Adsense account was receiving more clicks than it actually was, they would fix it.
But back to the issue at hand, how are advertisers and agencies supposed to gather the correct data. One of my sites gets about 250k page views a month. According to Google Analytics - 60k. That discrepancy does not compute. Deleted cookies might inflate my unique visitor count, but how does that account for 45 GB of data transfer. And thats not email solely traffic to our website.
In December our sites crashed due to a server overload. What happened, did the 145 visitors that Google Analytics reported cause that? I doubt it. Quantcast, Alexa, SiteMeter… they are all way off. How do these all work. It is a learning curve for me, although I’ve been learning for a year and a half now, I still don’t get it.
Log files reported 120k visits to my network in March with over 750k page views. QuantCast reported 16k with 80k page views. Who am I to believe? Perhaps more importantly, who are my prospects going to believe?
April 13th, 2008 at 11:19 pm
[…] traffic is up, see the chart below (see my previous post Analytics, Where did you get these?, for my thoughts on the actual numbers), our customers are happy and we are feeling pretty good […]