So, in order to aggregate that analytic data, the buyers are going to need to have analytics running behind the scenes whenever they're interacting with the site. Then the site itself can match the vendors ads to buyers’ behaviors on the site and then put that into the database for the marketplace application, allowing that data be aggregated later.
Most commonly, it's going to be a scenario where the underlying data from each user interaction on the site is decoupled from that user’s personal information so that in the event that something happened, such as a security breach, their sensitive buying patterns and interactions on the site aren't exposed outside of their particular direct account access.
So, in other words we want to make sure that the way we're storing the information is helpful for the sellers when they're reviewing their ads and banners, but also doesn't store too much sensitive information that puts the buyer’s sensitive data at risk.