Here's a breakdown:

* Cell differentiation is the process by which a less specialized cell becomes a more specialized cell type.

* This occurs through a series of steps that involve changes in gene expression, leading to the production of specific proteins and the development of unique cell structures and functions.

* For example, a single fertilized egg cell (zygote) differentiates into various cell types, including muscle cells, nerve cells, blood cells, and many more.

* This specialization is essential for the development and functioning of multicellular organisms.