It’s a noise gate on a plug in literally the most self explanatory thing ever, imagine you guys trying to deal with the real thing on an actual board ahahah
No and if u use a plug in it doesn’t matter cos it’s all digitalised, the noise suppressor goes first and then only your distortion pedals go into the seperate effects loop of the Noise suppressor.
i don't think your amp is broken, that's likely just your guitar's pickups or a noisy amp. but either way a noise gate would help, it would cut off that signal