
Is a way one acquires a right to use some other person's property. In the U.S. and other jurisdictions this legal concept is memorialized in the statutes, after a period of open and notorious use one can acquire an interest which can be defended in a court of law. Pity any owner that does not preserve their right by making a conspicuous notification like, "private property keep out" or something of that order.
Should you fail to protect your real estate interest, what you are doing in effect is clouding up the title to your property, later should you sell, it can significantly reduce the value of your property. Real estate easement by prescription demands that your eyes stay open.