Effects pedals digitally add sound variance to a guitar
The company DOD makes a pedal called the GS30. It's a good pedal for a beginner to have.
Fuzz-Medium gain and fuzz distort
Grunge-High gain and channeling
Metal-High gain and low end
Gate Thresh-When a certain volume is being reached(from the guitar)it will turn all sound off.
Chorus-Moody reverb, mysterious.
Ring Mod-Electronic ringing
Delay and Reverb