If you want the core story of Naruto’s journey to becoming Hokage and his rivalry with Sasuke, focus on these major milestones: Episode Range Why it’s important Kazekage Rescue The Akatsuki officially enters the fray. Tenchi Bridge Naruto and Sasuke finally meet again after two years. Akatsuki Suppression
"Filler" refers to episodes not from the original manga. They are created to let the manga get ahead. While some fillers are entertaining, many are skippable if you want only the main story. All Naruto Shippuden Episodes
Because include flashbacks and movies, here is the optimal watch order: If you want the core story of Naruto’s
(Episodes 134–143): The long-awaited confrontation between Sasuke and Itachi. Pain’s Assault They are created to let the manga get ahead
Hunting the Uchiha Naruto and friends search for Sasuke, who is hunting Itachi. This arc introduces "Sage Mode" training at Mount Myoboku and the battle between Jiraiya and the Six Paths of Pain.