Capo’s are used when 2 guitar players play one can play in the key of… and the other plays in perhaps partial capo. Capo’s in general are made for a persons singing range so they can hit the notes really good and the most use is for pitch and tone.
place your capo on the 7th fret and play Am F and G now take off capo and play Am F and G now again capo on 3rd fret hear the huge difference?
Just so you will be ready…some people will be ok with capo’s and others will try to tell you that you are not a guitar player if you have to use a capo. Well let it pass because when you see people play with one on stage and your at a concert and the country, rock, pop, classical, jazz pro’s use a capo then you can write off those dorks for saying capo’s are not pro well now they lost all credit and respect.