GSAT-18 is designed to provide continuity of services on operational satellites in C-band, Extended C-band and Ku-bands.

Weighing 3,404 kg at lift-off, the satellite carries 48 communication transponders to provide services in Normal C-band, Upper Extended C-band and Ku-bands of the frequency spectrum. It also carries Ku-band beacon to help in accurately pointing ground antennas towards the satellite.

GSAT-18 was launched into a Geosynchronous Transfer Orbit.

GSAT-18's co-passenger Sky Muster II, built by SSL (Space Systems Loral) in Palo Alto, California, is aimed at bridging the digital divide, especially in the rural and isolated regions of Australia.