So just what are Guitar tabs?

Today a little info about the word tab.

The correct name is Tablature,which is shortened to 'tab' or 'tabs'.
Its a form of musical notation that is written for musical instruments. These give the player the instructions on what to do and when. Rather than showing which notes to play,they show where to put the players fingers.
Tablature can be written for any type of fretted instrument,which is strung. Not just the guitar and bass. Other examples are, ukulele, mandolin, and banjo. Tabs can and are used for popular music and folk music too.

I may explore this a bit more.

Malc.Learn to Play Guitar