Well, like most things in complicated games, offense is a bit nuanced
To start off simple though: walking up to an opponent and throwing them is a simple offensive tactic.
Of course, people will try to press buttons to stop you from doing this. One common way to stuff faster, short ranged buttons is to get in range of Ken sHP and press it; this button doesn’t extend your hurtbox until it’s already hitting your opponent; making it good at accomplishing this task