This is the 191st most frequent Norwegian word.
gjør
"Does" or "do."
Here, 'gjør' is used to mean 'do', contextualizing an ongoing or future action the subject is performing.
Hva gjør du i morgen?
What are you doing tomorrow?
'Gjør' in this sentence takes on an idiomatic meaning, contributing to a phrase that indicates inconsequence or lack of importance.
Det gjør ikke noe.
It does not matter.
In this usage, 'gjør' translates to 'makes', referring to the production or realization of something (in this case, errors).