LOL at your noob question

pickups pick up the sound from your guitar and send it down a cable to an amp or some form of amplification device (PA system, recording device)

so if you plan on playing an acoustic live and it doesn't have a built in pick up, you'll need to mic it up
Quote by griffRG7321
become a circumsizer, you get like £60,000 a year + tips.

Quote by Flying Couch
Because I'm not aerodynamic. All the other airborne furniture laugh at me.

I am a noob so what i dont even have a guitar yet lol i just need to know the basics anyway thanks foir telling me