Why printers add secret tracking dots

My my printer doesn't, how do I know because I have a work order in since the 31st to get it fixed. They said just look it up on the base directory and load it again. The problem is over the weekend the printer changed its IP address. Which they didn't grasp until they said they " fixed" it twice from their office. RIGHT. I called them again, they said, they would have to come to my office. Then they called it fixed again. I called them again, they said, " they didn't come out yet?" I told them no, now I have been waiting two days for them to come. Maybe someday, you know even though it's the only printer in my building, I'm still low priority. God bless the IT folks!

I've known the dots exist, but did not know there was an actual code to them. I'll have to check that out.