Residential surveillance at a designated location means that someone is watching a specific place where people live. You know how sometimes Mom and Dad tell you to stay inside the house? Well, sometimes, there are people watching who goes in and out of that house to make sure everyone is okay.
It's like when you have a babysitter at home or a teacher watching you at school. They are there to make sure you are safe and not doing anything you shouldn't be doing. Residential surveillance works the same way. The person watching your house wants to make sure everything is alright and nothing bad is happening inside.
Sometimes, people need to do residential surveillance to catch someone doing something bad, like stealing or hurting others. But other times, they just want to make sure everyone is okay, especially if they feel like something is not right.
Overall, residential surveillance at a designated location means that there is someone keeping an eye on a specific place to make sure everyone there is safe and doing the right thing.