can someone explain IL vehicle stickers to me?

There are two types of stickers you must have on your car in Illinois: a license plate renewal sticker and a municipal sticker. You have to display the municipal sticker in your front windshield, generally in the lower right-hand side. The cost of the municipal sticker varies by town, but is generally $20 to $40 per year. Please get one as soon as possible as municipal cops can write you a ticket for not having one. You can get them from your town's municipal building during regular hours.

This is from an Illinois native.

Why don't you call up the municiple building for your area and ask what its all about. If it applies to your car then call the vehicle registration or licencing agency and ask them. As far as I know as long as you have a licence for the state you live in and the plates for your car and registration and insurance why worry about anything else to drive? You may just say, "what in the state of Illinois do I have to have to drive, (besides the car that is)? Thats all. Since you just moved to that state the people who lived there already maybe just playing a trick on you by making you think theres something more. I guess thats what the commenter "Dangerous" was talking about sortof.

Its the sticker you put on your license plate every year from the DMV, they usually mail it to you when its time to renew. I'm from Illinois.

I do not believe that's true

Just resign yourself to the fact that FIBS know nothing and everything in their weird flat state is confusing and backwards.

Thank you everyone for the answers.