Concrete welded mesh is made with reinforcing bars. Ribs increase abrasion between concrete and reinforcing bar, which make the construction stronger.
Black/galvanized deformed bars with high tensile strength and durability are used for building, housing, bridges, highway construction.
Reinforcing steel bar can be bent or cut. With high tensile strength, it's widely used in buildings, tie & lifting, wire products and so on.
PC strand made of plain/ribbed steel bars, with high strength, is usually for bridge, buildings, road, dams, poles, crane beams and concrete vessels.