Google's dominance in the search engine market isn't likely to end anytime soon, but Microsoft's Bing managed to continue its slow but steady growth last month, even though the search engine market in general remained at seasonal lows. According to the latest data from Compete, Bing's market share only grew from 8.7% in August to 8.8% in September, but the total query volume on Bing grew 8.2%. All the other large search engines - except for Ask - registered a decline in total search queries last month.
Yahoo Search continues its steady decline. Yahoo Search lost another 1% market share last month and has now lost a total of 5% since September 2008 when it still owned 18.8% of the market according to Compete. The total search volume on Yahoo was down 8% and Yahoo served 100 million less queries in September than August.

Google's market share grew slightly from 72.3% to 72.6%, while Ask and AOL remained stable. Based on this data, Bing seems to be eating into Yahoo's market share, but isn't growing at Google's expense.

Compete's Marko Madjarac points out that Bing's numbers are even more impressive when we take into account that Bing's users tend to perform fewer searches on the service (5 searches per user per day) than Google's users (5.6 searches). Bing apparently lives up to its promise to get users to relevant answers faster than any other search engine. Yahoo users performed an average of 7.8 searches per day.
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Very hard time to Yahoo :( yahoo's recession was already a buzz! and this latest #drop would certainly distress them. May be Bartz's has got acquainted to these!
I don't agree with the last paragraph. It is possible, but it's too big of an assumption. There's no causal connection between the number of searches per user and the effectiveness of the search engine. To take an other extreme: maybe Bing-users were so dissatisfied by Bing they simply didn't want to search there anymore.
Adrian
Two factors:
1)
People are still checking out because it's new and it does some stuff for particluar niches such as travel.
2)
Bing makes it easy to search for adult content such as videos and pictures.
I'd be interested to see how their traffic looks if they pull the adult content related seaches out.
My own theory of why Yahoo! is decreasing is due to closing any ability for people to post links anywhere and various site problems.People can only place a link in their email signature and how many times do people email?
last paragraph was ridiculous. I search 100 times a day on google, only once a while on bing.
Yahoo has been in steady decline for quite some time now. I don't use Yahoo for my own search, but I do use it to monitor my clients SERP status in the Yahoo engine. Over the last 4 month's, in particular, the results have been erratic, which was not the normal for Yahoo, because prior to these 4 months, out of the 3 major search engines, Yahoo was the most consistent.
This is a shame, because as much as I like using Google, I do believe a strong competitor is needed, and I don't believe Bing is up to the job.
Just because Bing has less searches on it than Google does not mean they are more relevant. Maybe people give up and go to Google? That last paragraph is pure hearsay.
Yahoo was the most consistent.
thanks so much for a nice topic
thanks so much 4 a nice topic. it's really a wonderful