Hi guys,
Just an FYI, Every 24th of September writers, readers, editors, publishers, and language enthusiasts in the United States gather to celebrate the National Punctuation Day. This was founded by Jeff Rubin in 2004 with the aim of promoting the correct use of punctuations. ☺☺☺
Example of a punctuation error:
"Let's eat Grandma." versus "Let's eat, Grandma."
Do you really want to eat your grandma or are you just inviting your grandma to eat? Which is which? ☺☺
The second statement is correct. The placement of comma tells us that the word "grandma" is in vocative case.