Polymerase chain reaction (PCR) technology is a molecular biology technique that is used to amplify a specific segment of DNA. This process allows researchers to make multiple copies of a DNA sample, which can then be analyzed for various purposes such as identifying genetic mutations, studying gene expression, and detecting pathogens. PCR technology is widely used in various fields of research, diagnostics, and forensics due to its high sensitivity, specificity, and efficiency in amplifying DNA samples. The technique involves multiple cycles of heating and cooling to denature, anneal, and extend the DNA target sequence, resulting in the exponential amplification of the desired DNA fragment.