Genetic sequencing is a process that determines the order of the building blocks, called nucleotides, in a DNA molecule. This sequence is crucial because it contains the instructions for building and maintaining an organism. By understanding these sequences, scientists can learn about genetic diseases, evolution, and even how to develop new treatments. There are different methods of genetic sequencing, with some being faster and cheaper than others. One popular method is called Next-Generation Sequencing, which allows researchers to analyze millions of DNA strands simultaneously. This technology has revolutionized fields like genomics and personalized medicine, making it easier to study complex biological systems.