There is hardly any advantage to using multiple filters, though there are a few very rare situations when it might have some very small advantages. The only two times that is normally done are: 1) when you need more water flow than even the largest filters allow for. Then you can setup two, or more, filters in parallel. 2) When you need extremely high reliability (like at a public water park) and so have several sets of equipment and can continue in operation even if one entire set of equipment breaks.
Using two of the same kind a filter in series is pretty much a complete waste of time. Using two in parallel allows additional water flow, but it will cost less and be more reliable to simply get a single larger filter (if one is available). There are some very minimal advantages to using a sand filter as a pre-filter for a DE filter (less DE filter cleaning), but not nearly enough advantage to justify the extra expense and extra maintenance.