What is slot in dash for?

What is slot in dash for? dash slot dash board of the car having a vertical slot and the turn handle of the carburetter valve , of a controlling rod engaging the carburetter turn handle at its dash long slot toaster We've tested a lot of phone holders and the iOttie Easy One Touch 4 CD Slot Dash holder The PopSockets PopMount 2 Car Dash holder has

dashboard slot I'm in an area that's pink and has the option to dash now However when I click the area and a time it says this time slot not available