A user who is browsing the internet sees Google Adwords display ad for laptop computers on a Google Display Network site, but does not click on the ad. Two weeks later, the user is interested in buying a laptop computer and decides to visit the site from the ad. The user finds the site by performing a Google search, goes directly to the site, and purchases a laptop. Implementing view-trough conversions would be valuable for the advertiser in this scenario because it would allow them to:

A user who is browsing the internet sees Google Adwords display ad for laptop computers on a Google Display Network site, but does not click on the ad. Two weeks later, the user is interested in buying a laptop computer and decides to visit the site from the ad. The user finds the site by performing a Google search, goes directly to the site, and purchases a laptop. Implementing view-trough conversions would be valuable for the advertiser in this scenario because it would allow them to:

Answer -  measure the number of conversions that are associated with ad impressions