If google is the issue maybe - but I
seriously doubt they are the issue: they sell their ability to target you, and selling your data to third parties would essentially be against their interest. This kind of FUD has been repeated ad nauseam here and everywhere in tech sites (against Facebook too usually), but that's not the way their business model works.
If it's your doctor or your pharmacist, or the shop you bought online (or offline) something once, incognito will not help at all. They have your personal information already, the only thing that can stop them is law. The cause of the robocalls may also have been his medical insurance, if you want to go full paranoia. :)
Note those shops, the sites you created an account on, the companies those shops sold your personal data to, all of them can target you with ads on both facebook and google by using your PI (essentially donating your data to facebook and google in the process).
If it's your doctor or your pharmacist, or the shop you bought online (or offline) something once, incognito will not help at all. They have your personal information already, the only thing that can stop them is law. The cause of the robocalls may also have been his medical insurance, if you want to go full paranoia. :)
Note those shops, the sites you created an account on, the companies those shops sold your personal data to, all of them can target you with ads on both facebook and google by using your PI (essentially donating your data to facebook and google in the process).