Update pop-or-shift.md

array/pop-or-shift.md

@@ -4,6 +4,6 @@ The `.shift` method removes the first element from an array and returns it.
 
 To remove the returned item without re-addressing the array and invalidating all references to it, `shift` requires moving the entire array around.
 
-On the other hand, `.pop` can simply subtract 1 from its length.
+On the other hand, `.pop` removes the last element of an `Array` by simply subtracting 1 from its length.
 
 Then `.shift` is usually much slower than `.pop`.