Here's the long scoop: the story in the pages of 'Hunter x Hunter' is not finished, and the most widely known anime run wrapped its broadcast without completing the whole tale. The Madhouse adaptation that started in 2011 ran to 148 episodes and beautifully covered up through the Election arc after the Chimera Ant saga, so that series is complete as a television run — it has a satisfying production arc, amazing pacing, and a full ending for what it adapted. There was also an earlier 1999 anime version that covers other parts of the story in a different style. Neither anime covers everything that the manga has tackled since then.
The manga itself is the living thread of the series. Yoshihiro Togashi has extended the world beyond what the anime animated, moving into the Succession War and Dark Continent-related storylines (the storyline gets pretty dense and deliciously dark). However, Togashi's health has led to frequent and sometimes lengthy hiatuses, so new chapters arrive irregularly. That means the printed and digital manga is still the only place to follow the newest developments, but it’s a slow, stop-and-start experience. If you want the latest canon moments, the manga is where to go; if you want polish, choreography, and music, the 2011 anime is an artistic jewel.
Personally, I flip between both depending on my mood: I’ll rewatch the anime for the sound design and fight choreography, then binge the manga chapters when Togashi drops new installments because nothing beats the unpredictability of the plot twists on paper. If you haven’t read it officially, support the licensed releases — they help keep the series healthy and increase the chance of future animation. I’m cautiously hopeful we’ll see more animated material someday, but in the meantime I find the gaps give the fandom space to theorize and savor each chapter when it arrives — it keeps the excitement alive in its own weird way.