Single-cell genomics is a field of study that focuses on analyzing the genetic material of individual cells. This approach allows researchers to understand the unique characteristics and functions of each cell, which can vary significantly even within the same tissue. By examining the DNA or RNA from single cells, scientists can uncover insights into cellular diversity, development, and disease mechanisms. This technology has applications in various areas, including cancer research, where it helps identify different tumor cell types, and developmental biology, where it reveals how cells differentiate into specialized types. Techniques like single-cell RNA sequencing enable these detailed analyses, advancing our understanding of complex biological systems.