https://player.vimeo.com/video/643513757?h=575e613cb8&badge=0&autopause=0&player_id=0&app_id=58479
It triangulates the mesh and uses a dual graph to produce cells - Triangles or Ngons.
mtDualGraph generates new topology from its child object, in this example a Cube primitive.
You can use a vertex map or selection tags to define where new topology is generated.
Drag the tag from the Object Manager into the Selection Map link field.
The Plane on the left has a polygon selection tag, which is displayed in the viewport. An identical Plane is on the right as a child of a mtDualGraph. New topology is only generated on the selected polygons.
The Plane on the left has a vertex map, which is displayed in the viewport. An identical Plane is on the right as a child of a mtDualGraph. New topology is only generated on the polygons where there is sufficient vertex weight.