In order to distinguish the DNA of one person from another, scientists often rely on the presence of short tandem repeats (STRs). These consist of short DNA sequences that are repeated many times in a row. Why are STRs useful for identification

STR can be defined as the short tandem repeats which is generally different in people.

It is unique to the person and have a very slow rate of mutation and because of this property these fragments are stable and predictable.

They have a higher power of discrimination and is highly used in the identification of the human beings. It is used on a regular basis in case of forensic science, for the identification of victims, missing person and other criminal cases.