The world is such a massive place and many of us only get to experience such a small part of it. For some of us that is fine and we are quite content but for others, they may wish to get out there and travel around a bit to see what else the world has to offer.
Travelling around the world can bring a massive sense of adventure and can help people not only learn about other cultures and the way other people live but also help them learn more about themselves.
If you are open minded and accepting then you can make a lot of new friends by travelling around the world and are most likely to be able to get close to many of the locals in the areas that you are staying in.
It is not cheap travelling around so you may have to save up for a while and possibly try and find work whilst on your travels, but if you are happy to stay in hostels etc then you can do it on a relatively low budget.