What's an essential feature of the phone you think everyone must know/use ?

What feature of this phone or Samsung in general do use the most ?

This is my first Samsung phone and my first flagship phone (dream come true wiee). Comparing from my previous mid range phones, this just feels like an improved version of everything from speed, camera and features. However, it feels like I'm not fully utilizing them especially with the AI. Like what AI feature or tasks do you usually use it for? What settings are a must . I have already watched YouTube videos of S25 features and stuff but It just seems like a good to know vid. I would appreciate if owners of this phone would let me know what the function they usually utilize. May it be for school, work or hobbies .

Thank you .