Across our clients, from January 2008 to February 2008, Google picked up 2.3 points of ad spend share. Across our clients, comparing February 2008 to February 2007, we did not observe evidence of an advertising or sales slow-down.

Danny Sullivan, SearchEngineLand’s illustrious Editor-In-Chief, emailed me some follow-up questions about how we buy clicks and how we allocate budgets.

Matchtypes and negatives play key roles in keeping your ads away from less relevant search queries.

Here are our January 2008 PPC search engine share numbers.

I wish Yahoo and Microsoft all the best. But combining two organizations with serious problems in search wouldn’t yield one strong organization.

Yahoo open-sources some truly amazing code, such as YUI.

Amusing: hacking Google analytics via Yahoo pipes.

In October, across our clients, Google picked up 3 points of ad spend share, reaching 79% share. Google’s gain came at Yahoo’s expense: Yahoo’s share fell from 19% in September to 16% in October. Microsoft held steady in distant third, maintaining a 5% share.

Paid search market share held relatively stable in September, with Yahoo picking up one point of share from Google.

During July and August, across our client base, Google picked up four points of paid search market share, mostly at Yahoo’s expense.

Yahoo squeaks ahead of Google in the American Consumer Satisfaction Index.

I’m helping organize an open enrollment executive education course on online marketing at UVA’s Darden School this fall. Come learn about online marketing from the people, companies, and academics shaping tomorrow’s web.

As 2007 is now half over, it seems a good time to compare the performance of the Big Three search engines year-to-date.

Google continues to comprise three-fourths of our agency’s total monthly PPC spend. In June, Yahoo held steady, while Microsoft picked one point of share from Google.

The Times Online reports rumors of Yahoo acquiring MySpace.

Big changes at Yahoo.

Yahoo clarifies quality.

We review May 2007 ad spend data for our agency. Google continues to dominate, with three fourths share. Google lost one point of share each to Yahoo and Microsoft. This small downward blip marks the first month in the last four in which Google did not gain share.

Yesterday Yahoo announced they are opening up the API to their new search platform (aka “Panama”). I caught up with Dan Boberg, Yahoo’s Managing Director of Sales Technology by phone yesterday to talk about this API announcement.

Yahoo has introduced a new CSS class, “Robots-Nocontent”, which allows web masters to keep the Yahoo spider from reading portions of a web page.

AP reports Yahoo paid Semel $80m in ’06.

April showed Google seizing yet more share from Yahoo, with Microsoft holding steady in distant third.

Yahoo confirmed our suspicion that since geo-targeting locates a user by IP address, if an IP address cannot be determined, the user goes into an “Unknown” bucket. Thus ad campaigns limited to “US Only” are not visible to these Unknowns, and traffic drops off; Unknowns are only served ads from campaigns set to “Entire Market”.

Google grabbed the DoubleClick deal. Here are revised observations and prognostications.

“Building awareness around their client’s credit card program through search is just as useful as one that drives users to sign up for the program”? I’m dubious.