The Juice probe will take about eight years just to reach Jupiter. Once there, it will use the gravitational field of Jupiter to slingshot itself onto rendezvous and flybys of other moons. And then about three years into the mission, they will try to put Juice in orbit around Ganymede. They'll be looking for all the magnetic instrument readings that will be able to tell them what the ocean under the icy surface is actually like. I think it's absolutely the next step in our search for life beyond the Earth.