unlocks the "point" level. It allows you to select individual vertices (or groups of vertices) and manipulate them via a specialized Gizmo (manipulator widget). This is often called "Sub-Object Mode" modeling.
Instead of Ctrl+clicking 50 individual vertices, brush mode lets you "paint" over your model to select vertices. You can adjust the brush radius and strength. Vertex Tools For SketchUp
Here is everything you need to know about why Vertex Tools is a game-changer for precision modeling. unlocks the "point" level
Designing an ergonomic mouse or a molded plywood chair? You cannot build those complex curves with standard push/pull. Create a basic subdivided box, then use Vertex Tools to pull the "armrest" area up and tuck the "seat" area down. Vertex Tools For SketchUp