Tab notation doesn't provide full time signature information, if you're picking up a piece of music which you've never heard played before
In tablature, imagine one string's line shows ---10-----7--8------11----13. How long do you hold each note? Clearly 7 to 8 is quick, but how quick? Sheet music gives you this exact information.
In tablature, imagine one string's line shows ---10-----7--8------11----13. How long do you hold each note? Clearly 7 to 8 is quick, but how quick? Sheet music gives you this exact information.