Oil-based paint uses an oil binder and dries slower than latex, which gives it time to level out into a smooth, hard finish. That hardness makes it a good match for trim, doors, and cabinets, though brushes need solvent for cleanup.
The slow dry time cuts both ways. It’s what produces that smooth, leveled surface on detailed woodwork, but it also means dust settles into a coat longer, so workspace cleanliness matters with oil-based products.