Commas Can Be Pretty Important!
Check out these comma catastrophes-
The Cannibal Grandma: The placement of a comma makes a big difference between inviting Grandma to a meal and considering her the meal: "Let's eat, Grandma!" vs. "Let's eat Grandma!".
The Oxford Comma Debate: A dedication stating, "I dedicate this book to my parents, Mark Twain and God," without an Oxford comma, humorously implies the author's parents are Mark Twain and God.
The Misplaced List: A simple comma changes the meaning between liking cooking and family and pets, versus liking to cook family and pets: "I like cooking, my family, and my pets," versus "I like cooking my family and my pets".