With a business in an eligible country, call conversions help advertisers understand the value that calls from their ads are driving by counting calls of a minimum duration to a Google forwarding number as conversions.

Google Adword Mobile Advertising Exam and Answer (April 2016)

With a business in an eligible country, call conversions help advertisers understand the value that calls from their ads are driving by counting calls of a minimum duration to a Google forwarding number as conversions.

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