A prime lens has a fixed focal length, while a zoom covers a range of focal lengths. In general, zooms are the most versatile choice for everyday use and for fast-changing situations like sports, events, or photojournalism, because you can reframe quickly without moving or changing lenses.

Primes are often preferred when speed of operation matters less and image quality, size, or a wide maximum aperture matter more. Fast primes are especially useful in low light and when you want shallow depth of field, such as for portraits, food photography, or performing arts where flash may not be allowed.

Macro lenses are designed for close-up work on small subjects. They’re the right tool when you need true close focusing and high magnification for things like detail shots, small objects, or nature close-ups. Many macro lenses are also primes, and some can double as portrait lenses, but macro lenses are generally not chosen for distance shooting.

So: zoom for flexibility, prime for speed/aperture and often better optical performance, macro for close-up magnification.