Growth is a common theme. Naruto grows not only as a shinobi but also as a person. He becomes more understanding of different ways of life. And there is often a theme of mystery. As he travels to new places, there are often secrets to uncover, like hidden jutsu or ancient prophecies related to the lands he visits.
One common theme is self - discovery. As Naruto travels, he learns more about himself, his abilities, and his place in the world. Another theme is cultural exchange. He gets to experience different cultures in the shinobi world, like the unique traditions in the Land of Tea or the advanced technology in some other lands.
Friendship is a big theme. Naruto meets new people during his travels and forms new bonds. These friendships often help him in unexpected ways. Also, adventure is a key theme. He goes through all sorts of challenges and exciting situations in different parts of the world, whether it's facing new types of beasts or dealing with different political situations in various villages.