A comma splice is probably the most common punctuation error out there. It slips by a lot of good writers because it doesn't really obscure your meaning. If you read your sentence out loud, it sounds alright; however, a comma splice is a legitimate punctuation error that will distract your reader and undermine your credibility as a writer.
What is it?
A comma splice occurs when a writer joins two *independent clauses with only a comma.
Why is it incorrect?
A comma is not strong enough to hold two independent clauses together.
What does it look like?
It’s cold out there, you should wear your tuque.
Happy birthday, I hope you have a great day.
Here's that book I was telling you about, I think you'll really like it.
How can you fix it?
1) Add a *coordinating conjunction: It’s cold out there, so you should wear your tuque.
2) Replace your comma with a period: It’s cold out there. You should wear a tuque.
*An independent clause is a complete sentence. It has a subject and a verb and makes sense by itself.
*You can remember coordinating conjunctions by using this acronym: FANBOYS
For/ And/ Nor/ But/ Or/ Yet/ So