A Transform is the numerical representation of an instance of an Object geometry where the object may be any of the following:
Single Transforms accessed via a Placement node may be applied to a Mesh, a Volume, a preceding Placement node, or a Group node.
Figure 1: Transform Node Connected to a Placement Node
Figure 2: Result in Viewport of Transform Node Connected to Placement Node
When applied to a Scatter node, the number of transformed instances is virtually unlimited and are represented as a list of transforms. Refer to the section on Scatter for information about the Scatter node.