Google Sites led the explicit core search market in October with 66.9 percent of search queries conducted, according to data released by comScore, Inc. Google Sites were followed by Microsoft Sites with 18.1 percent (up 0.1 percentage points) and Yahoo! Sites with 11.1 percent. Ask Network accounted for 2.6 percent (up 0.1 percentage points) of explicit core searches, followed by AOL, Inc. with 1.3 percent.

"Explicit Core Search" excludes contextually driven searches that do not reflect specific user intent to interact with the search results.

comScore Explicit Core Search Share Report October 2013 vs. September 2013 Total U.S. – Home & Work Locations Source: comScore qSearch
Core Search Entity	Explicit Core Search Share (%)
	Sep-13	Oct-13	Point Change
Total Explicit Core Search	100.0%	100.0%	N/A
Google Sites	66.9%	66.9%	0.0
Microsoft Sites	18.0%	18.1%	0.1
Yahoo! Sites	11.3%	11.1%	-0.2
Ask Network	2.5%	2.6%	0.1
AOL, Inc.	1.3%	1.3%	0.0

19.3 billion explicit core searches were conducted in October, with Google Sites ranking first with 12.9 billion (up 4 percent). Microsoft Sites ranked second with 3.5 billion searches (up 4 percent), followed by Yahoo! Sites with 2.2 billion (up 2 percent), Ask Network with 499 million (up 5 percent) and AOL, Inc. with 260 million (up 4 percent).

comScore Explicit Core Search Query Report October 2013 vs. September 2013 Total U.S. – Home & Work Locations Source: comScore qSearch
Core Search Entity	Explicit Core Search Queries (MM)
	Sep-13	Oct-13	Percent Change
Total Explicit Core Search	18,650	19,339	4%
Google Sites	12,477	12,934	4%
Microsoft Sites	3,350	3,495	4%
Yahoo! Sites	2,101	2,151	2%
Ask Network	474	499	5%
AOL, Inc.	249	260	4%

In October, 68.4 percent of searches carried organic search results from Google, while 27.1 percent of searches were powered by Bing, comScore said.