Put simply, it's the height your strings are set from the guitar's frets. If the strings are higher, they become harder to push down with your fingers – and that means the guitar is harder to play.

We’re going to take the process in manageable stages to cover string changes, fretboard and fret cleaning, guitar body cleaning, truss rod adjustment, string height and intonation, plus pickup height.

The Slinkys became the industry standard, and to this day, is still the best-selling string — they currently top Amazon's best-selling strings chart.

First, we'll consult the MusicNomad string height gauge / fret rocker's chart shown below to find out the kind of heights we need to aim for to achieve different actions. They refer to the heights of ...