Growing up, 'Zoey 101' felt like this bright little world I could step into — but behind the scenes things changed quickly, and that's a big reason the show wrapped after four seasons. The immediate trigger everyone talks about is Jamie Lynn Spears' pregnancy announcement in late 2007: production went on hiatus as she prepared for motherhood, and by the time things could have been arranged, Nickelodeon and the creators opted not to continue the series. Beyond that, the cast was literally growing up, and networks often face the tricky choice of letting a middle-school set age awkwardly with its actors or ending on a reasonable note. Creative fatigue and shifting priorities at Nickelodeon probably nudged the decision too; plenty of shows quietly end because the network wants to refresh its lineup.
If you want to watch it today, the rights live with Nickelodeon/Paramount, so 'Zoey 101' shows up on Paramount's platforms and on places where Nickelodeon's library is licensed. You can usually buy seasons or episodes on services like Amazon, iTunes, or Vudu, and there are physical DVDs if you prefer that. Availability can change by country — sometimes it briefly pops up on other streaming services — but Paramount is the most reliable home. I still smile watching it; it feels like a time capsule of mid-2000s Nickelodeon energy.