Dirt

Dirt is not really a useful block. It doesn't look nice, and Dirt Blocks drops from Dirt and Grass Blocks. Dirt is very common, and is found under Grass everywhere. Dirt is also found underground in random veins.

Uses
Dirt has no real use, it can't be crafted, cant be used as a crafting ingrediant, and doesn't look very nice in buildings. However, on your first day of Minecraft, you might make your house out of   Dirt.

Growth
Dirt can grow into Grass if it is next to a Grass Block and is in light level 9 or over. If covered by a block, dirt cannot grow into grass.