“Every word should bring something ... “and,” “but” or “so” connects two clauses that could stand alone as sentences, put a comma before the conjunction unless the whole sentence ...

Other coordinating conjunctions can be: but, for, or, nor, so, yet ... Always add a comma after adverbs that end in “ly.” Other introductory words or phrases that require a comma after ...

Note that there’s no comma after “shipment ... We know this because of one word: the conjunction “and” before “peanut butter.” A serial comma would make little difference: We ...

Other coordinating conjunctions can be: but, for, or, nor, so, yet ... Always add a comma after adverbs that end in “ly.” Other introductory words or phrases that require a comma after ...