Per the Wikipedia description, "Each episode of Tales of the Jedi tells a short story featuring Jedi from the Star Wars prequel trilogy era. The six episodes are split into two 'paths': the first following Ahsoka Tano across various points in her life, and the other depicting a young Count Dooku before his fall to the dark side of the Force."
Created by Star Wars expert Dave Filoni, Tales of the Jedi was made in the same vein as Filoni's other animated juggernaut, Star Wars: The Clone Wars.
Ahsoka Tano has become one of the most beloved characters in all of Star Wars and, after getting her start in animation, made the jump to live-action in season two of The Mandalorian. In the three episodes of this series where we follow her, we look at the beginning of her life until she joins the Rebel Alliance while in hiding post-Order 66.
For anyone unfamiliar with Tano, she was the Padawan learner to Anakin Skywalker during the Clone Wars. Eventually leaving the Jedi after being falsely accused of a crime, she was nevertheless hunted during Order 66 but managed to escape. Across the entire series of The Clone Wars, Star Wars: Rebels, The Mandalorian, and The Book of Boba Fett, we've seen Ahsoka at her highest and lowest.
Ashley Eckstein voiced Ahsoka in her animated appearances, with Rosario Dawson taking over as her in live-action. Eckstein makes a welcome appearance here, voicing Ahsoka in two of her shorts.
Elsewhere, Count Dooku is the central figure of the limited series' other three episodes. Dooku's shorts are the far more interesting ones; as his backstory we've never seen too much of before. We knew that he had once been a Jedi Master and taught Qui-Gon Jinn, but now we get an idea of what he was like during his time with the Order.
We encounter Dooku as his fall to the dark side begins, as his anger gets the better of him during a mission with a young Qui-Gon, and another where the Republic's corruption has become all too apparent, but the Jedi refuse to see it.