From the site's description: "The Interactive Fiction Database is an IF game catalog and recommendation engine. IFDB is a Wiki-style community project: members can add new game listings, write reviews, exchange game recommendations, and more."
The IFDB is a wiki that enables users to add entries for interactive fiction works, make recommendations and reviews, and access tutorials on downloading and playing these works. The ability to create a membership and profile creates a community of player-readers and IF authors.