Goldman Sachs issued a research update on Internet searchInternet search giant Google (Nasdaq: GOOG) today, saying Google disclosed that under its Online AdSense program, it shares 68% of AdSense for Content revenue and 51% of AdSense for Search revenue with site owners.

Goldman said that information isn’t model-moving, but Google could be vulnerable to competition from Microsoft (NYSE: MSFT) on the AdSense front.

The note reiterated Goldman’s six-month $680 price target on Google and an “attractive” rating.