Using the Pave action will use your most recently added or moved Paving Material to Pave a 1x1 area of the ground. Many Structures require Pavement beneath them before being built. Forageables and Creatures will not spawn on Paved areas and unlike Dirt, Biomes will not regrow over Paved areas and therefore pavement can be used to direct the regrowth of Biomes. Bushes, Trees, and Tilled Fields cannot be planted on Pavement however, Pavement can be placed underneath a Tilled Field after they have been planted.
CAUTION: Many Pavement Materials such as Brick, Clay, and Stone have other rare Inspirationals that also count for as theses materials. When Paving, put these items away, or make sure the correct item is selected.