This video with downloadable slides showcases the importance of commas, for example, the difference between "Let's eat, Grandpa!" and "Let's eat Grandpa!"
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Gulick, Angela and Parkland College Center for Academic Success, "Commas (Video and Slides)" (2018). Punctuation. 12.