Cell counting is a laboratory technique used to determine the number of cells in a given volume of a sample. This process is essential in various fields, including biology, medicine, and pharmaceutical research, as it helps researchers understand cell growth, health, and response to treatments. There are several methods for cell counting, such as using a hemocytometer, a specialized microscope slide, or automated cell counters that use lasers and imaging technology. Accurate cell counting is crucial for experiments, as it ensures that the right number of cells is used for analysis and helps in comparing results across different studies.