When you create a component, you turn SketchUp geometry into something special.
A basic component becomes reusable and separate from other geometry.
PRO If you’re a SketchUp Pro user, you can add attributes to create dynamic components. Users can then configure certain aspects of the component, or the component can add steps to staircases or pickets to fences as you scale the dynamic component.
After you try a few basic dynamic components to get a feel for how they work, you find specific examples that walk through the steps to building complex dynamic components and references and examples for the building blocks of dynamic components: attributes, functions, and operators.