This site is brilliant on 2 really different ways . Imagine you live near an airport and on your drive outside your home you dont use 1 of the spaces , well turn space into money , register with just park ,rent your parking spot out and make money . Its seriously so easy and will make you money for doing nothing.
As said before the other reason is your going on holiday , you get greeted by a £ bill for parking your car at the airport for a couple of weeks . Ouch ouch ouch ,head to just park put nearest the airport your travelling from or maybe its a train station and you see where there is a drive you can leave your vehicle at and take my word for it will always be cheaper than parking at the airport /train station .
If your parking just for a few hours or a day or 2 or maybe 2 weeks while you go away ,save yourself some pennies.