The largest planet in the solar system appears as a bright disk on which maybe two darker stripes can be identified. These are the two biggest bands of clouds that move around the gas planet. To see them you need 20x to 30x or more magnification offered e.g. by a spotting scope, otherwise you’ll only see a bright disk.
Close to Jupiter you’ll usually see four conspicuous “stars”, which change their position in the course of a night noticeably. These are the four brightest moons of Jupiter – Io, Europa, Ganymede and Callisto, which are also known as the Galilean moons. With a little luck you can observe how a moon disappears for some time in the shadow of the planet, or how it passes before or behind the planet. The dates of the Jupiter moon events can be found either in a yearbook or a computer program.
The moons are theoretically visible to the naked eye with brightness’s up to about 5.0m, but they are outshone by the bright planet.