Cell growth is the process by which cells increase in size and/or number in a controlled and regulated manner. This fundamental biological process is essential for the development, maintenance, and repair of tissues and organs in living organisms. Cell growth involves a complex series of cellular events, including cell division, protein synthesis, metabolism, and nutrient uptake. Understanding the mechanisms and regulation of cell growth is important for various fields of research, including cancer biology, developmental biology, regenerative medicine, and drug discovery. Scientists study cell growth to uncover the underlying molecular and cellular mechanisms that drive it, with the aim of developing new therapies and treatments for various diseases and conditions.