u/FlappyTesties

Target recently installed these over all of the doors going in or out of the store. Is it for tracking people or items?

Can anyone provide insight into the repair process for this? The roof above this was missing gutters and I believe the splash back from the rain caused the degradation seen in the photos. Now that I’ve hung gutters I’d like to fix this. I’m a DYI type of guy but I’ve never done anything like this before. I’d appreciate any insight you all could provide about what’s involved in repairing this. Thank you!