e|-------------------------------------------------------|<------ thats your highest string
E|-7-------4-------5------------7-----4-----5------------| <-----thats you deepest string

the numbers are the frets so 7 would be the 7th fret
the numbers correspond the the fret on the said string so, 7 on D would be the 7th fret on the D string (4th string from high e).
Last edited by ilikepie15 at Feb 5, 2009,
Also you read left to right in sequence. Notes played on the same vertical line are played at the same time.