How to read Tabs on Guitar?

Tabs are just the number of frets which should be pinched according to the given number e.g:


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These are the Tabs of "Addat" 


e|---4-5-4-4-4-4--------------------------------------|
B|-----------------7-5-4-4-4--4-5-4------4-5-7-5-4---|
G|-------------------------------------6---------------|

1. The Alphabets given on Left side e,B,G are the name of strings on guitar.
2. The Numbers given are the number of frets.
3. Now just the place where I have written start from here means that you will start the song from there.