From the notation - that little teeny curved line indicates a scoop.
It means a small/slight slide into the 14th fret.
For those, you can start one fret below or two frets below. Where you start doesn’t matter. The SOUND is the important thing.
I call it greasing up the note.
You need that 14th fret to have a little grease in front of it. You are sneaking into it. As long as you are scooping into it, you’re doing it right, regardless of what fret you’re on.
It has the rhythmic effect of a grace note - you start off the note and very quickly get onto the correct note.
It’s called a scoop, I think.
Hope that helps.