Supply refers to the total amount of an asset that is available to consumers. It can relate to any amount available at a specific price, or the entire price range if shown on a graph.
Demand refers to the quantity of an asset a consumer is willing to purchase at the desired price. Supply related closely to demand an asset at a specific price.
All else being equal, as supply provided by producers increases, the value of the asset will decrease, and vice versa. All else being equal, as the quantity demanded an asset increases, the value of the asset will decrease, and vice versa.