Via Starwars.com:

NEW TO STAR WARS? GET UP TO SPEED WITH THIS PRIMER ON SOME OF THE GREATEST LIGHTSABER-WIELDING, MIND-TRICKING GUARDIANS OF PEACE AND JUSTICE.
Taking your first steps into Star Wars with The Force Awakens? Eager to learn more about the galaxy far, far away? The Star Wars 101 blog series will be your own Jedi Archives with all you need to know.

“For over a thousand generations the Jedi Knights were the guardians of peace and justice.”
– Obi-Wan Kenobi (A New Hope)

An ancient order of Force users committed to serving the light and preserving peace above all (even if a lightsaber is required to do it), the Jedi are the most prominent good guys of the Star Wars saga. While there have been many Jedi featured in Star Wars films and television shows throughout the years, these are the most notable.

Yoda
“Try not. Do. Or do not. There is no try.”
– The Empire Strikes Back

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