What do you understand by the term non-metal?

Hint :The periodic table is divided into three main types, metals, nonmetals and metalloids. In the periodic table, metals are at the bottom left, and nonmetals are at the top right. On a periodic table, metalloids distinguish metals from nonmetals. A stair-step line defining the element groups can also be seen on several periodic tables.

Complete Step By Step Answer:
Non-metals are materials that lack any of the characteristics of metals. They are excellent heat and power insulators. They are usually gases, but they can also be liquids. Carbon, sulphur, and arsenic, for example, are stable at room temperature.
Non-metals are elements that accept or gain electrons to form negative ions. The outermost shell of non-metals normally has 4, 5, 6, or 7 electrons. Non-metals are porous and cannot be wrapped into wires or hammered into sheets due to their brittleness. They are bad heat and energy conductors. These don't have a silver sheen on them and don't reflect light.
High ionisation energies and electronegativity are two characteristics of nonmetals. Nonmetals typically gain electrons when interacting with other molecules, forming covalent bonds, because of these effects. The anionic dopants have a heavy effect on the VB among the non-metals. Carbon, phosphorus, fluorine, sulphur, and iodine are non-metal dopants.

Note :
Non-metal is a necessary component of life. When breathing, oxygen is inhaled. Fertilizers include nitrogen, which is used to improve soil fertility. Water purification involves the application of chlorine and fluorine. It is also an antiseptic that's added to cuts.