Before you post, check what you’ve written.
It’s only a social media post. But it carries your name, and you want to build credibility as an author.
Before public speakers step on stage, they check they don’t have broccoli in their teeth or TP stuck to their shoe. It’s hard enough to deliver a message without a distracted audience.
So before you post on social media:
Wait. Walk away from the screen for a few minutes. Then pretend it’s from a friend who asked you to give it a proofreading.
Check subject-verb agreement. Plural subjects take a plural verb. Single subjects, a singular verb.
Watch your apostrophes. If the word’s plural, no apostrophe before the S. If the word is possessive, use an apostrophe + S. (Except for it’s and its. The first is a contraction for it is; the second a possessive. When I type fast, I always get that wrong.)
Confirm the spelling. Those red, crinkly lines under some words are your friends. (They just told me crinkly doesn’t begin with a K.) Assume your readers won the sixth-grade spelling bee.
Ask a friend. If you don’t know a grammar guru, ask Google.
Readers may still not agree with the message of your post, but at least they won’t be distracted by your spelling and grammar.