It seems that MSN has been aggressively increasing the size of its index over the last month or so. We’ve been seeing massive increases in competing pages across many hundreds of search phrases. Sometimes with well over a 10 times increase in competition.
Conversely, Google seems to be doing the opposite and reducing the amount of competing pages. As an example here’s some data for the search phrase “search engine optimization”.
October 2007 - Google: 19,800,000 MSN: 41,644,219
September 2007 - Google: 38,200,000 MSN: 2,200,250
It seems that Google is refining its index to produce more relevant results; Is MSN bloating its index or just trying to play catch up? For those who have also picked this up, please share your thoughts.
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