Should a comma be used before the conjunction 'and' in a sentence?Maybe, due to ignorance, I was never using a comma after the conjunction 'and'. I used to always write like 'apple, orange and guava' instead of 'apple, orange, and guava'.
However, recently after installing the tool 'Grammarly', I am always getting an alert to put a comma before the conjunction 'and'. Because of this reason, I have got confused.
In the contents appearing on various internet resources also, generally, a comma is found used before the conjunction 'and'.
What is the correct grammar rule regarding such cases?