Hopefully, you're now just a bit more confident about using some of the most common punctuation marks. There's no mystery to good punctuation; it simply takes practice and common sense. There aren't even many 'hard and fast' rules - punctuation marks should just be used to make meanings clearer and writing easier to read.
Look over some writing you've done recently, and see if your new-found punctuation skills can make this work better.
Good luck!
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