Grammar and Punctuation - what you need to know

From a newsletter I'm signed up at:

Here’s another perfect example of why punctuation is so important. I found a link to this one on Twitter. It’s called ‘Punctuation saves lives’.

‘Let’s eat Grandpa!’
‘Let’s eat, Grandpa!’

It’s only a comma, but what a difference it makes! And it just goes to show how important grammar and punctuation are in writing.

*smirks*