Facebook’s Slowing Sales Growth Shows Mobile-Ad Struggle: Tech

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Facebook Inc. is set to post another quarter of slowing revenue growth after struggling to wring money from advertisers seeking to connect with users of mobile devices.

In the second earnings report since its May initial public offering, the company may say third-quarter sales rose 29 percent from a year earlier to $1.23 billion, the average of analysts’ estimates compiled by Bloomberg. That’s less than the 32 percent year-over-year rise it posted in the second quarter and a 45 percent gain from a year earlier in the first quarter.