Welcome to Chordie Jamier!
Conventions in Tab can have variants, but I believe what you are looking at is 13/14 to indicate play the note at 13 and bend up to the tone of the 14th fret on that same string. Conversely the back slash would indicate starting with a string bent to that note and releasing the bend to the next fret number descending ie: 13/14\13, play 13, bend to 14 and release to 13.
If I have that wrong, I'm sure someone will be along to correct or clarify my statement. As a new guitar player you have certainly come to the right place to get help and music to learn along with the tips and tricks to make your journey more enjoyable. There are lots of good people around here to get to know and I'm sure you will fit right in, so visit often, post regularly and jump right in!
Take Care & Welcome Aboard!
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