Primes - Fixed focal length lenses Zooms - Variable focal length lenses

“A zoom will help you figure out which focal length you lean towards. Once you know that you can buy a fast prime at that focal length.”

Primes over zooms

Superior image quality - fewer glass elements - sharper images with less distortion and lesser optical imperfections
Better low-light performance and greater depth of field - primes offer larger maximum apertures (e.g., f/1.4, f/1.8) than zooms, allowing more light to enter the camera
Portability - primes are generally smaller and lighter
Pushes creativity - the fixed focal length of prime lenses forces photographers to get creative
Cheaper when you mostly shoot at fixed lengths

Zooms over Primes

Flexible focal length (one can punch in to 70mm and get a nice single portrait, then push out all the way to 24 or 35mm to get a nice group shot)
Less frequent lens changes
Cost efficient when you do plan to shoot at multiple focal lengths

You can check with your photo app/ Lightroom for the focal length of the shots you shoot at, the mode will give you an idea