@julieheyer - It will make sense once you start using it! It makes life so much easier. Also, make sure to read like the entirety of
Disneyland Daily's website and How to start your day at Disneyland/DCA articles. She's so savvy and we had a great trip by following her advice!
We would grab 7 Fastpasses using Maxpass for say Radiator Springs Racers. Then the 3 other adults plus my 3 big kids would go on the ride so I'd get Rider Switch scanned onto 3 of our tickets when they checked in for their Fastpasses. I would stay back with the toddler and go on a nearby ride like Luigi or Mater. By the time we were done with our ride, the other big group would also be done. Then I'd grab my 3 big kids (using our leftover Fastpass plus the 3 rider switch) and the other adults would take the toddler on another ride. Big kids got to ride twice while toddler got to ride something nearby twice. We didn't use Rider Switch all that much since we didn't always have everyone wanting to ride a ride (like Guardians (eek!) or the Incredicoaster (Hubby hated it, lol). Plus we went on a slow week and were very fortunate to have short wait times and plenty of Fastpasses to play with.
We originally planned to only get 4 MaxPasses since $70/day for 5 day really adds up BUT it saved so much time and sanity. It's totally worth it just to be able to go on our favorite rides as much as possible. It is also nice to be able to cancel Fastpasses that just don't end up working. Being flexible is important when you have toddlers and sometimes naptime takes too long and you know you're going to miss a Fastpass so I'd cancel it so someone else could grab it.