Fill dirt is that part of soil used to raise the level of the ground, to fill holes in the ground, to raise garden beds, and to adjust the slope of the ground.
Fill dirt can be used for Major Construction, Raising Garden Beds, Adjusting the slope/level of the ground, etc.
Organic matter is the feature common to topsoil and compost. Compost is decayed organic matter, and healthy topsoil usually contains organic matter.
The cost of delivery varies depending on the quantity of your order and the distance. Some sellers can deliver free of charge if you buy large quantities of fill dirt.
Fill dirt contains little or no organic matter, so it is normally not used for planting, but for construction. However, you can optimize it for planting through soil amendment.