Over the last few weeks, my AdSense revenue dropped significantly. I was curious and a little annoyed but didn’t investigate much. When I did take action, I realized quickly what I’d done.
I have a Large Rectangle unit on my pages, which is the prime moneymaker. But I also have (and might eliminate in the future) a Link Unit. Link Units are nice for the per-pixel ROI, but they don’t make a ton of money. A few weeks ago, I moved my Link Unit to a higher position on the page, trying to boost revenue.
It worked. I earned a higher CTR for the Link Unit and made a little more money. But in doing so, I crippled my Large Rectangle. It was actually a terrible move.
I found all of this out by using channels effectively. (If you’re not using a per-ad unit channel, you’re really missing out. Make sure to communicate information such as particular unit, color, and position on the page. When you change it, change the channel so you can do an A/B comparison.) I looked back in the AdSense stats to find the first day of stats for my newly prominent Link Unit. I then compared overall revenue and revenue per-unit for my pages before that change and after.
The difference was clear. It caused a direct decrease in my revenue for the Large Rectangle that clearly outstripped the increased revenue for the Link Unit.
So here’s a question: why was I getting so much less money for the Large Rectangle. My CTR wasn’t too much different. Does AdSense feed the best performing individual ads to the first link units placed on the page (in the top-to-bottom order of the HTML)? Was I robbed my Large Rectangle of high-paying ads?
If you know the answer, speak up. Maybe I can find it for myself, too.
Update!
I did find the answer! (Shouldn’t have been so lazy…) From the mouth of Google…
Tip for maximizing multiple ad units: make sure that the ad unit with the best placement on the page is the ad unit that appears first in your HTML code. This will help ensure that your prime ad real estate is occupied by the ads that place highest in the auction and will generate the most revenue for you. Find out how to define the first ad unit.
And here’s a bit more detail from Google about what the “first ad” actually means.
Share This