Take this phrase, I often used it with my students when I was a teacher.
“Let’s eat, Grandma” and
“Let’s eat Grandma” Two totally different meanings and a tiny thing like a comma makes so much of a difference. If you don’t get how, that is ok you probably need to go back to elementary school for other things as well… oh and YES I know I am an elitist snob but there is so much to make fun of about people sometimes I just can’t help myself. I would never do this to someone who honestly didn’t know or had no reason to learn it. But if you were in almost any westernized nation you would have heard something similar to this.