It allowed my parents to use legal defense if anyone tried to enter peacefully and then attempt to hurt them. There were other parts of the ward system, but they were minor compared to those. I had informed my parents of it so they could be mindful. I still needed to get necklaces for my parents for their personal protection. Hopefully, once I get to Gringotts, I will have the funds for two, possibly more depending on what was saved from my first life.