"Last week, the Rimm-Kaufman Group disclosed what is apparently an inadvertent bug in Google’s Broad Match algorithm. Last summer’s switch from minimum bid to first-page minimum bid wasn’t supposed to impact broad match logic at all, but it did in a big way. The result? Agencies and advertisers who pay attention to the numbers saw a dramatic and essentially unmanageable decline in the performance of broad matched keywords, forcing down bids to remain efficient, dropping traffic and sales, with damage to Google’s revenue as well."
Search Engine Land
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