The same underpinnings that power social games is well suited to real-time ad and content targeting. For example, Couchbase provides a fast storage capability for counters. Counters are useful for tracking visits, associating users with various targeting profiles (eg, user-1234 is visited a page about "automobiles" and "travel") and in tracking ad-offers and ad-inventory.
Multi-GET operations in Couchbase allow ad applications to concurrently "scatter-gather" against profiles, counters, or other items in order to allow for ad computation and serving decisions under a limited response latency budget.