What does this mean in tabs?

Question

i wanted to learn a song and i saw this but i dont know what it means.
----------/12--
-----------------/14-----
--3-------------

i want to know this part /13

Answer 1

You slide from first to 13th.

Answer 2

Guitar/Bass Tablature. Each line is a string and each number is the fret you need to put your finger on to get the note. Play them in order from left to right.

Example above: 1st string 3rd fret, 3rd string 12th fret, 2nd string 14th fret.