Controlled by parameters. In a Revit project - parameters define the relationships between elements of the building model. These relationships are created automatically by Revit Architecture and by you as you create the design. As you work in drawing

Revit is often used for designing buildings and creating 3D models of architectural designs. It allows architects to create detailed building designs, visualize the project in 3D, and produce detailed documentation and construction drawings.
Revit is a contraction of Revise-Instantly.