What is does it mean when your being followed around by a red cardinal bird?

Not all naturally occurring phenomenon can or should be interpreted as a sign or omen. Cardinals are a common backyard bird and have little of no fear of people. Because of their bright colour the are very noticeable. If you have a bird feeder in your backyard, or your neighbour has one, the cardinal is simply on his daily round of gathering food.

I would simply say having a cardinal visiting you daily means you are fortunate enough to have nature's creatures close by.