The Tablature Staff represents the strings and frets of an instrument. A standard guitar has six strings and therefore guitar Tablature has six lines to a staff.
Each line represents a string, the lowest line is the lowest string (low E) and the highest line is the highest string (high E). From bottom to top the names of the strings are E, A, D, G, B, E.Numbers on the Staff represent which fret should be pressed by a finger. Tablature is read from left to right and the following example tells you to first put a finger on the second fret of the "A string" and play that note. After that you play an open note (open = no finger down) on the "low E string."
Here is a more complex example:
To play this:
1. - Finger on second fret of "D string." No finger on "A string." - Play.
2.- Finger on second fret of "G string." - Play.
3.- Finger on second fret of "B string." No finger on "high E string." - Play
4. - Finger on second fret of "A string." No finger on "low E string." - Play
5. - Finger on second fret of 'D string." - Play
6. - Finger on first fret of "G string." No fingers on "B string" or "high E string." - Play
You might have noticed that with Tablature there is no way of telling what rhythm to play. This might not be a problem with familiar music but with unfamiliar music we need to show rhythm in one of two ways.
The first way of showing rhythm with Tablature is to show both standard notation and Tablature at the same time. This is very common in published popular music.
The second way of showing rhythm with Tablature is to draw stems and beams above the Tablature staff. 
(Sometimes the stems and beams will be drawn directly on the staff, with
circles added around the fret numbers for whole and half notes, creating a hybrid notation
system.)In addition to Tablature I recommend learning Standard Notation as it will greatly help with the learning of music theory.