Google has eliminated the limit to how many categories AdSense publishers can filter from their sites. There are 11 categories, and users can filter as many of them as they want.

Google has made some adjustments to how it uses referral URLs for contextual matching of AdSense ads. Google has started expanding the use of query words in referral URLs to a few hours.

Basically what this means is that Google is using user’s search history to determine what ads to show on sites using AdSense. If a user arrives at one AdSense site via a search results page, and then goes to another AdSense site within a few hours, they might see ads based on the referral data from the first one.

Google has launched an AdSense feature that lets AdSense publishers donate their earnings to Haiti earthquake relief efforts.

Google announced today that AdSense for Domains is now using optional keyword hints more often. Keyword hints are provided by the user, who enters keywords into a field to assist Google in the targeting of ads for potentially ambiguous domains. Google’s Randy Heath explains:

Big businesses with huge pageviews fueled by Google have emerged in recent years that exist only because of a unique SEO / Adwords relationship with Google. Google gives them a huge presence in the long tail SERPS and they in turn give Google increased revenue by being a Google Adsense partner. Not just any Adsense partner, but a Google partner that turns Google search generated traffic into billions of Adwords clicks totaling tens of billions of dollars. 

Google announced that it has made some messaging changes in the AdSense interface. The changes concern users’ earnings.

Google has added the words "Estimated" and "Finalized" next to "Earnings" throughout users’ accounts. The company says the move was made to be more transparent. The changes in messaging do not reflect any changes to the way finalized earnings are calculated. The company says they’re simply intended to give users a clearer idea of Google’s estimations of earnings and what is actually finalized.

AdSense is an important fixture in a lot of people’s lives; it can represent anything from spending money (hey, little splurges do the heart good) to what pays the mortgage.  And now, individuals have a chance to shape it more to their liking, as a new Product Ideas for AdSense page has launched.

Try not to get your hopes up; as word spreads and more people contribute ideas, the odds of any one suggestion making it in front of an important Googler will decrease.  Also, there’s no guarantee that any of the recommendations will be implemented.

It has been discovered that Google is now showing AdSense ads inside Google Earth. While it is not that surprising to see Google putting ads on another one of its properties, it has raised a few eyebrows, given that Google Earth is a desktop application.

Update: Google has now announced that you can buy Promoted Videos directly in AdWords.

Google announced the beta testing of a new AdSense interface today. It is being tested with a small group of publishers. Google says the new interface was designed based on the top three requests from users:

Google launched AdSense for Feeds all the way back in 2005. Now the company is integrating it right into its Blogger property.

Back in August, Google gave AdSense publishers more control over what ads appear on their sites by launching an upgrading the category fitlering feature and extending the feature’s beta to the US and the UK.

So in essence, if you don’t want certain kinds of sites showing up in ads on your site, you could block them. Google shows how the different ad categories contribute to your income, so you can take that into consideration.

Google has started adding "Ads by Google" to more of its ads around the web. The reasoning for this is that a lot more advertisers are using Google’s rich media ad formats these days, and the fact that they come from Google may not seem so obvious all the time.

Unemployed bloggers are apparently at risk of losing their unemployment checks (or at least having them drastically reduced) if they include ads on their blogs. That is exactly what happened to a woman named Karin, from New York, according to a recent Forbes piece.

Google has announced a new feature for AdSense mobile publishers, which lets them serve text and image ads on their sites, specifically optimized for high-end smartphones like the iPhone, Android devices, and the Palm Pre.

With the launch of the feature, publishers can run larger AdSense ads on these phones, whereas before, they could only serve smaller ads.

Google has announced the DoubleClick Ad Exchange, which it refers to as a real-time marketplace for helping online publishers and ad networks/agencies buy and sell display ad space. Prices in the marketplace are set in a real-time auction.

Google says it has three principles for its approach to display advertising:

Google has introduced what they call "Web Elements," which let users add their favorite Google products to their website. The company spins it as a way for AdSense publishers to "spice up their site" and help increase their revenue. This was first announced back at the Google Developer Conference.

In August, Google announced that it was upgrading its category filtering feature for AdSense, and extending the feature into more countries (like the US and the UK). Today, Google announced that they have added two additional improvements to the Competitive Ad Filter.

Google announced plans to give AdSense publishers a new way to generate revenue by allowing multiple Google-certified ad networks to compete for display ad space on their sites. This means that AdWords advertisers may end up having to pay more competitively, while AdSense publishers could reap the benefits.

What do you think of this idea? Comment here. Google explains the concept in the following video:

Google has expanded the number of European places where Euro reporting is available for AdSense. Users who are in the following locations can now switch to local currency reports to view their earnings in Euros:

Google announced (subtly) that it is rolling out a series of enhancements to AdSense’s contextual targeting capabilities to more accurately match relevant ads to AdSense publishers’ pages.

Unfortunately, not many details about these enhancements were given away, but Google says AdSense publishers will not have to update their AdSense accounts or ad code. Changes will be applied automatically.