What do the different signs on the shield on the Canadian red ensign stand for?

Question

the red ensiegn is the red flag with the union jack and a shields with three lions together, a single red lion, A harp, and three fleur de lis

all those have the triple maple leaves underneath

Answer 1

The original red ensign had the arms of the four founding provinces, but that was changed in the early 20th century.  The red ensign is flown with great respect by many Canadians.  Here are a couple of links that should give you the information you need.