A covalent bond, also called a molecular bond, is a chemical bondthat involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs orbonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
example could be "Water, H2O" as it is formed by the share of electrons of hydrogen and oxygen (which are both non-metals). And another example of a covalent bond coud "Carbon dioxide, CO2".