A tab is an easy way to learn how to play a song if you can't read sheet music, For guitars it has six horizontal lines with numbers on them, each line represents a string, each number represents a fret, The bottom line represents the sixth string(low E) the top string represents the first string(high E). Below is an example of a tab.
Here is a list of some of my favorite tabs.
Crazy Little Thing Called Love - Queen
Rock You Like A Hurricane - Scorpions
Dazed And Confused - Led Zeppelin
Feel Your Love Tonight - Van Halen
If you prefer sheet music I have a page for that too.