This document provides an introduction to Building Information Modeling (BIM). BIM involves creating a parametric and computable model of a building using software that can be used for decision making, planning, cost estimation, and construction. BIM is important for modern construction as it allows for collaboration between owners, designers, and contractors. Key benefits of BIM include allowing designers to identify conflicts early, enabling prefabrication, and providing a virtual environment to experiment with a construction project before building. In conclusion, BIM helps the construction industry work smarter and produce better buildings by creating collaborative systems and assisting companies in meeting goals.