Graph Search tool aims to increase Facebook's utility

Facebook's Graph Search tool, released in the U.S. on Monday, is aimed at making it easier for users to rediscover older or more difficult-to-find content. Experts say making information easy to access will prove essential to the network's ability to court advertisers. Facebook brought in $1.5 billion in advertising revenue in the first quarter, or 6.5% of all online ad spending in the U.S., according to eMarketer.

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