Roberts is a lunar impact crater that is located in the far northern latitudes on the far side. It is located to the east-southeast of the crater Karpinskiy, and to the northwest of Sommerfeld. To the north is Thiessen. This is a heavily worn and eroded crater with a rounded outer rim that is incised and damaged by multiple smaller craters. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.