There are only a few reasons that Google may call a business, but Google does not make unsolicited sales calls from an automated system. Google's automated calls are non-sales related, and are typically calls to schedule an appointment or confirm GMB business details.
Google's automated calls use the voice calling service Duplex, which calls from either 650-203-0000 or 650-206-5555 in the US and +6 498-847-777 in New Zealand. Calls from this service start the call with the reason for the call, letting you know that the call is from Google.
Google operators may also call for the purposes of development, customer service, or support related to Google Ads, Google Play or other Google Accounts.
What to do if you receive a suspicious call:
Unfortunately, there are many companies who will scrape your number from any number of public sources and then make fraudulent and misleading calls. Many of these calls are not allowed under US law and should be reported to the FTC.
Here's what to do if you receive one of these calls,
Add your location's number to the US National Do Not Call registry
This could help stop (or limit) these calls from coming through. The main issue here is that a lot of these spam callers use throw away numbers, making it difficult for the FTC to truly enforce it as they can't trace the call back to a specific company or caller. However, it's a good starting point.
Don't provide any information or press any keys
Even if the automated message gives a prompt such as, "Press 0 to be removed from the call list", do not do so. Some people have reported that after doing so they've "accepted the charge" and were billed for that call. When it comes to these unwanted calls, feel free to hang up or decline the call at any time.
Talk with your phone company about call blocking tools
Depending on what phone provider you have, they may offer call blocking services or have recommendations. Some services are free, but others might charge a fee. To see if your provider is on the list, check out the FCC’s Call Blocking Resources.
For more tips, also check out the FTC's how to handle unwanted calls, and robocalls resources with additional information about robocalls and steps you can take if you receive one.