# Map of content A map of content (MOC) is a specific type of note in a [[Zettelkasten]]: its purpose is to aggregate knowledge in an unconstrained fashion, unlike folders. As you write more and more notes, you might identify shared patterns and relations between them: MOCs allow you to group related notes dynamically in a format that is easily modifiable (see [[The Zettelkasten primes your knowledge for serendipity]]). MOC creation is best handled as an emergent process: rather than trying to predict how your knowledge notes will be organized, it is more efficient to organically identify MOCs as your Zettelkasten grows.