They're going to build a space station near the moon and possibly also a base on the surface in order to establish a permanent human presence there. The two main purposes aside from pure science are to learn how to live in deep space and on other planets, and to figure out how to mine the vast amounts of frozen water and minerals on the moon in order to make further space exploration easier. E.g. water has oxygen for breathing and hydrogen which can be used as fuel. It will be very useful for deep space exploration in the future if we don't have to bring it up from Earth.

It's a test flight. One of the most important tests will be of the heat shield which has to withstand thousands of degrees of heat when Orion re-enters Earth's atmosphere at 25,000mph (40,324kph), but of course it's also a test of the SLS rocket that sends Orion into Earth orbit, the OMS engine and maneuvering thrusters that it uses while it's in space, and all the other hardware and software that will eventually be used to send people to the moon.

The Artemis 1 mission's Orion spacecraft is on its way to the moon's orbit, where it will circle the moon a couple of times, then fly back to Earth and land in the ocean. here's a NASA video showing its planned trajectory.

Quesst has sounded interesting for a long time, I'm just curious to hear firsthand if its "sonic thump" is really that much better than a sonic boom. They'll be flying over major cities in 2024 and then asking residents what they think of the sound, that should be interesting. It could revolutionize air travel in the 2030s if it works.