A more thorough explanation:

Definition: Effect is the result or outcome of an action or cause.

For example, if you study hard for a test, the effect will be a good grade. Another example is if you eat too much junk food, the effect will be weight gain.

Effect can also refer to the result of a legal agreement or law. For instance, a new law may have the effect of increasing taxes or changing the way people do business.

The verb form of effect means to bring about or make something happen. For example, a company may implement new policies to effect positive changes in the workplace.