Answer:
The net ionic equation shows only the substances that change in the reaction.
Step-by-step explanation:
The net ionic equation focuses only on the the substances that are really reacting. the net ionic equation does not show the spectator ions. Spectator ions are ions that do not really have a part in the ongoing reaction.
Hence, it can summarily and safely inferred that the advantage of writing the net ionic equations instead of formula equation is that the net ionic equation shows only those species that are directly involved in the reaction.