Google has been trying to tie store purchase to ad impression [1]: "This location tracking ability has allowed Google to send reports to retailers telling them

Google has been trying to tie store purchase to ad impression [1]: "This location tracking ability has allowed Google to send reports to retailers telling them, for example, whether people who saw an ad for a lawn mower later visited or passed by a Home Depot. The location-tracking program has grown since it was first launched with only a handful of retailers. Home Depot, Express, Nissan, and Sephora have participated." [1]https://www.washingtonpost.com/news/the-switch/wp/2017/05/23/google-now-knows-when-you-are-at-a-cash-register-and-how-much-you-are-spending/?utm_term=.1ef5f15f3a49 https://www.washingtonpost.com/news/the-switch/wp/2017/05/23...