Thread:CustardBursts/@comment-38257681-20190519035611/@comment-34064772-20190519185341

The comma before the and is called an Oxford/Harvard Comma or Series/Serial Comma and is obsolete throughout the UK and Canada but is more widely used in American English. It’s usually a stylistic thing used for clarity but is by no means necessary (Tl;dr you don’t have to use a comma unless its absence makes the sentence muddy)
 * jumping into the convo*