DNA barcoding especially used in the field of molecular biology that uses primers with 500-700 segments to classify various species at molecular and genetic level. This review focuses on the role of DNA barcoding in conservation of biodiversity and current applications for the discovery of species. Some species of plants and animals remain unidentified at molecular level. DNA barcoding uses molecular tools for the discovery of species found in natural ecosystem and playing important role in biodiversity conservation. Genetic barcoding mainly focuses on conservation strategies on populations due to differences found in the mitochondrial DNA. The most commonly used DNA barcodes for the plant species are ITS, rbcL, psbA-trnH and matK. DNA barcodes has several applications for the detection of plants species by providing specific information about the taxa. There is need to use DNA barcoding in combinations with other sciences such as ecology and taxonomy methods for conservation of biodiversity. There is also need to use databases for appropriate storage of data about species to conserve biodiversity.