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Thanks to a $100 million advertising campaign, BING, Microsoft’s search engine, is gaining ground on Google.

It’s not like it’s an even fight at this point, but BING is closing the gap, albeit a very wide gap.  BING increased its market share of search from 8.0% to 9.3% in the latest study from Comscore.

Google still has 64% of the search market and Yahoo has 19%.

$100 million may be a lot to invest for an additional 1.3% market share, but given that there are now more than 100 billion searches per month, an additional 1.3% is big deal for BING.