Adwords Formula for Displaying Call Extension Button?

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  • PPC/SEM
  • |
Has Google or anyone published details as far as how Google determines if a call button is displayed on a mobile device for an ad with call extensions enabled. Or is this one of those "black box" kind of things that Google doesn't publish specific details about and you just have to try to guess via trial and error what is actually going on?
#adwords #button #call #displaying #extension #formula

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