A geosynchronous satellite is a satellite in a geosynchronous orbit.  They are placed into orbit so that their orbital period is similar or the same as the Earth’s rotation period. They usually take 24 hours to make one single rotation. The satellites are used for communications at high latitudes, like places in Russia and Canada. Throughout the 24 hours they move over the Earth in a figure of eight pattern centred on a longitude. They move slowly so they can be useful and handy.