Semantic design versioning is a system to organize and track the evolution of designs in collaboration. It helps in capturing complexity, conveying meaning, maintaining order, and ensuring extensibility. This approach enables designers to break down problems into smaller parts, define each part's meaning, arrange steps in an ordered manner, and create a system that can grow with the team's needs. By adopting semantic design versioning, designers can communicate more effectively, navigate complex projects, and ultimately create better experiences for their customers.