Mesh wires can be used for various purposes. It is highly preferred in 
vegetable gardening as it makes farmer to work efficiently and easily. If the purpose is to support tomato crops or other likely crops,mesh wires would be the perfect choice. They are also widely used in fencing and trellises. Mesh various can be creatively used at times depends on the need, for instance with a sheet of plastic used with it can serve as mini greenhouse or can serve as isolation cage against damages caused by pests.
Mesh wires come in many varieties, if talking generally usually woven mesh wires or reinforcing mesh wires. Woven mesh wires are expensive due to galvanization and manufacturing method as well hard to work with for gardening type of purposes because of its hardness. Concrete reinforcing mesh wires are much softer and inexpensive, can be used to build strong cages.