Matrix sets up relationships between assets when you build your site. These inter-asset relationships are called links. Links control how assets display in you website frontend. Links also control more technical aspects of your website, such as how asset relationships are managed through web services and APIs.
You can link an asset to another location on your site or between several different locations. Managing assets relationships like this lets you have far greater control over where the content appears on your frontend. The Linking screen of an asset lets you view detailed information about its incoming and outgoing relationships to other assets. This screen also lets you change an asset’s parent and child relationships.
For Web services and APIs, these link relationships use a set of type codes to define each type of link in the Matrix database. These type codes provide a robust way to communicate asset relationship information between systems. You can read more about type codes in the System link values documentation.