Throughout the Naruto series, Naruto Uzumaki is constantly growing and developing his ninja skills. He trains relentlessly and learns powerful new techniques, such as the Rasengan, the Chidori, and the Sage Mode. He also gains access to the Nine-Tailed Fox's chakra, which gives him an enormous boost in power.
By the end of the series, Naruto has become one of the most powerful ninja in the world. He is able to defeat powerful opponents like Pain, Obito, and Madara. He also becomes the Seventh Hokage, the leader of the Hidden Leaf Village.
While the Fourth Hokage, Minato Namikaze, was a powerful ninja in his own right, Naruto eventually surpasses him in terms of strength, skill, and overall power.