Controlling your water variable helps you to get consistent cups of coffee every time you brew. Ignoring the variable greatly affects your brewing outcome: if you put too little water, it'll be overly strong and overpowering, if you put to much, the flavors are lost and often over-extracted, both making undesirable cups of coffee.

We usually use a 1:15 ratio of coffee grounds to water as our go-to, and it's just right.