Let's Eat Grandma - The Killer Comma. Yesterday, I wrote about the Oxford Comma, also known as the serial comma. See http://www.italki.com/notebook/entry/163191.htm Today I am continuing to stress on the importance of using the comma correctly. Someone had written asking why is the correct use of a comma is so important. Somewhere in my past entries, I had given an example. However, the example may be too difficult for some beginners to understand. It involves with the wording and the misplacement of the comma that led to an expensive lawsuit between the company and the Canadian government. Here is a very simple example shown in the photo below. It changes the meaning entirely. So the need to use the comma correctly is of utmost importance.