Using correct grammar is always beneficial. It gives your writing more credibility and also may keep nitpickers on social media from pointing out that you used “your” instead of “you’re.” While Spellcheck and Autocorrect are helpful, they don’t catch everything — especially punctuation.
Remember, proper punctuation can save lives: One tiny comma is the difference between “Do you want to eat, Grandma?” and “Do you want to eat Grandma?”