Shonen anime is the most popular genre in the industry. The best of them have solid and fluid animation, epic fight scenes, awesome openings, quirky dialogue, easy to follow plot, entertaining characters with exaggerated but fun expressions, etc. In just one episode, JUJUTSU KAISEN showed all those qualities indicating we might be witnessing the next hit shonen. This one has a more supernatural element compared to the fantasy centered aspect of other shonen, so in a sense it's refreshing and interesting. Nonetheless, if you enjoyed the big hitters like Naruto, Bleach, etc., JUJUTSU KAISEN will feel right at home.
Edit: Season 1 finished recently and I'm pleased to say Jujutsu Kaisen is truly another great shonen. The animation during the fight scenes is amazing, Mappa as a studio is outstanding and one of the best in the business. Characters are fun and filled with personalities and the plot is filled with interesting themes and scenes. Just watch this anime and be prepared to be entertained.