what is resonance.how to apply it in organic compounds.plz gv some examples.

RESONANCE IS ALSO CALLED DELOCALIZATION OF ELECTRONS ON CONJUGATION.IT IS THE STATE IN WHICH COMPOUNDS ACTUALLY EXISTS IN NATURE.IT WAS FIRST OBSERVED IN BENZENE WHEN THE BOND LENGTH PREDITED DIDNT QUITE MATCH WITH THE OBSERVATION.OUT OF THE VARIOUS CANONICAL FORM(WHICH MAY NOT EXIST OR EXIST FOR A SHORT PERIOD DUE TO SOME OTHER CAUSE),ONLY THE MOST STABLE CANONICAL FORM CONTRIBUTES TO RESONCE.NOW-A-DAYS THE MO-THEORY HAS REPLACED WITH RESONACE,SINCE IT GIVES ITS  EXPLANATION IN A BETTER WAY!

FOR A BETTER EXPLANATION WAIT FOR AN IITIAN,I AM JUST A STUDENT OF 11TH GRADE.