This is an advanced lesson, if you haven't seen the basic lesson Click here for lesson 1.
Definitions of what the symbols mean can be found in the guitar glossary.
As a beginner you only need to learn the guitar tablature symbols for notes and rests.
Learning to play guitar starts with the basics. The following diagrams are for more advanced players, or for someone who wants to learn more advanced music.
You'll find some useful, downloadable, free tab software that finds, plays and loops tablature here:
Free Guitar Tab Software