Serial Comma (Within List Of Similar Elements)
When creating a list or series of multiple things which are similar, commas should be used to separate each item in the list.
N.B. American English requires the use of a comma before the last and in a list; British English does not. Be sure…
Caramel apples the neat way. Hollow out apple halves, pour in melted caramel, when it is hardened, slice.