how to read tabs

e |------------------| first string(thinnest string)
B |------------------| second string
G |------------------| third string
D |------------------| fourth string
A |------------------| fifth string
E |------------------| sixth string(thickest string)

e |--2---------------|
B |----------3-------|
G |-3----------------|
D |----------3----0--|
A |------------------|
E |------------------|
The number symbolize the fret and the position of the
number tell us which to play first.We can see the string
on number 3,fret 3 is play before the string number 1
fret 2.When come to the number which is in the same line
which means we have to play both lines together.And
number zero means open string.

e |-3----------------| This means strum the whole string.
B |-0----------------|
G |-0----------------|
D |-3----------------|
A |-2----------------|
E |-0----------------|

Basic signs you need to know:
/ slide up
\ slide down
h hammer-on
p pull-off
~ vibrato
x Mute note