Facebook studied more than 50 digital campaigns conducted using Datalogix's data. Overall, it showed that 99 percent of the sales that were generated from branding campaigns run on Facebook came from people that viewed an ad but did not click on it.

The effectiveness of the advertisements depend on the frequency with which ads are shown, which can be determined by using Datalogix's tool, Facebook said.

Also on Monday, Facebook wrote more about its partnership with Datalogix as part of Facebook Exchange (FBX), its online system that allows advertisers to bid on advertisements shown in real time.

Datalogix sends Facebook reports on "large groups of people" comparing their product purchases and whether those people saw or didn't see an ad, Joey Tyson, a privacy engineer. Facebook and Datalogix use the same method to hash email addresses, which enables them to match up users and categorize them.

Facebook doesn't see any purchase data, and Datalogix does not receive information from people's profiles, Tyson wrote. An "industry-leading auditor" has confirmed how the process works, he wrote.