Downsizing refers to permanently reducing a company's workforce through layoffs and restructuring. There are several reasons for downsizing, primarily to increase efficiency and profits by cutting costs. Common methods include replacing human workers with machines, outsourcing jobs, or shutting down entire divisions. While downsizing aims to make companies "leaner and meaner", it also has disadvantages like losing skilled workers and hurting employee morale. Managing layoffs well through support services can help minimize the negative impact.