So i start fiddling, this is fun, hit a button accidently and WOW! what a sound, punchy, clear - what did i just do? i eventually realised i'd hit the Bypass button and was getting the raw sound with no processing. i couldn't find a setting i liked. This may in part be due to my lack of understanding of these devices, but i do know what EQ is

So this begs the question: what the hell do you use these things for? i tend to use EQ to cut - just a highpass usually to clean up those lows, but rarely use EQ within a mix. Is it a case of picking the right sounds to begin with (which is what i hope i'm doing)? Are EQs really necessary? i've occasionally used GraphEQ but apart from the cutting shelves, that's it.
i feel i'm using an inadequate amount of EQ.