what exactly is feedback? why do i get it from a guitar? is there a way that it can it be prevented without purchasing any devices?
In laymans terms, feedback is when sound bounces back and forth from your guitar to your amp at high frequencies. It is a harmonic squeal, and not desirable. To prevent it, dont stand too close to your amp, or reduce volume a little.
DARK_MATTER, Instrumental Post-Metal from Ireland

Ibanez BTB 405QM
Ashdown PM600 - Peavey TVX 4x10
Russian Big Muff

Fender Jim Root sig
'99 Stagemaster 7-string
Yamaha F310
Hughes & Kettner Warp 7 w/4x12