Most webmasters and SEOs are obsessed with Google web search algorithm updates but very few talk about when Google updates their AdSense algorithms.
A WebmasterWorld thread asks if there is such a thing as an AdSense Algorithm update.
Personally, I think there is. There are algorithms for everything Google does, especially AdSense. There are AdSense algorithms for:
- Pricing
- Ad matching
- Ad formatting
- Smart pricing
- Display versus text ad placement
- Spam fighting
- and much more...
I am confident Google is routinely updating these algorithms to constantly tweak and improve them.
Forum discussion at WebmasterWorld.

Comments:
Madhav Tripathi
02/08/2013 02:36 pm
Sure there is some Adsense algorithm change. Since 2nd February my daily Adsense earning is 25% to 30% less.
Andy
02/08/2013 03:03 pm
Is it possible you're seeing this because of the link disavow update in January, so your traffic is now lower? It's worth checking before jumping to conclusions.
Reji Kumar
02/08/2013 04:43 pm
yes Madhav Tripathi. Mine also