That means you can skip almost 300 episodes of flashbacks, side missions, and alternate reality dreams without missing a single beat of the main plot.
This report only provides information on the number of episodes in the Naruto series and does not include analysis of the storyline, characters, or themes. how many episodes of naruto is there
According to anime filler lists, nearly of the original Naruto series is filler. Shippuden is better, but still sits at about 29% filler. That means you can skip almost 300 episodes