Tilting and Shifting in Photography manipulates focus planes using special tilt shift lens, using Scheimpflug principle. Technicality aside, its great fun!
Some examples courtesy of tilt shift images..
Example of a CANON Tilt Shift(TS) lens
If you don’t have the equipment to do this optically, there are plenty of websites with plugins to manipulate your images digitally, one of which is tiltshiftmaker.com
Try it, and do share your creations with us! It’s more effective if your scene is really wide and from a top-down point of view.