Genital herpes is caused by two types of herpes simplex virus. These types include herpes simplex virus type 2 (HSV-2) and herpes simplex virus type 1 (HSV-1). People with HSV infections can pass along the virus even when they have no visible symptoms.
HSV-2
HSV-2 is the most common cause of genital herpes.
https://www.mayoclinic.org/diseases-conditions/genital-herpes/symptoms-causes/syc-20356161
Had to look up definition of HSV to know what it is