Google, Inc. (NASDAQ: GOOG)'s market share in April increased once again, going from 67.25% to 67.90% of all internet searches performed in the U.S. Sounds like a tiny increase, but we're talking hundreds of millions of additional searches here. Even a tenth of 1% is a major increase.

Google also earned the distinction today of being named the No. 1 most-visited site by ComScore, topping Yahoo for the first time.

Both Microsoft Corp. (NASDAQ: MSFT) and Yahoo, Inc. (NASDAQ: YHOO) saw decreases in search market share due to Google's continued dominance. April data from internet traffic research firm Hitwise indicated that Google continues to dominate U.S. internet searches, while being responsible for the lion's share of connecting web searchers with specific industries as well.

For example, 31% of of web traffic and health and medical sites was supplied by Google, as well as 23% of web traffic to travel websites. This alone demonstrates the power Google has over the web. Some industries would see huge decreases in traffic if Google were to go away. In effect, Google's web search dominance has a very broad and meaningful over entire industries on the web, including shopping and classifieds, news and media, entertainment and others.

Still think Google is worth $576.30 per share?