You are reading the documentation for an older Pickit release. Documentation for the latest release (2.4) can be found here.
Pickit Teach is a detection engine that works in 2 steps:
Teach a model: Show an object to the camera or directly upload its CAD file to teach its shape.
Detect the object(s): Pickit will then look for similar shaped objects in a new scene.
In the image below, first a single socket was shown to the Pickit system, next similar shaped sockets are found in the bin.
You can learn about the main ideas behind the Teach engine by watching this video tutorial.