To find out which note is in Fret 8 on the 3rd string, we need to route it back to the same note an octave below on the 5th string. In order to do so, we move two frets back and skip one string (follow the green arrow). The resulting note is in Fret 6 on the 5th string, so D#/E♭.
One secret to marketing that should be applied across the board is that a “call to action” is generally going to be one of your most effective marketing tools. If you can incentivize your new fans to spread the word to their friends than you’ve initiated a word-of-mouth marketing channel that will be more valuable than anything you can do personally.