The Laffer Curve is represented graphically as a curve, with tax rates on the x-axis and government revenue on the y-axis. The curve shows that at a 0% tax rate, the government will collect no revenue, and as tax rates increase, government revenue will also increase. However, at some point, the curve reaches a peak and begins to decline, showing that as tax rates continue to increase, government revenue will decrease. This is because at some point, the disincentive effects of high tax rates will lead to lower economic growth, resulting in lower tax revenue for the government.

The Laffer Curve is often used to argue for lower tax rates as a way to increase government revenue, by boosting economic growth and increasing the tax base. However, it's important to note that the shape of the Laffer curve is highly debated, and some economists argue that the optimal tax rate may be lower or higher than what is suggested by the curve depending on the specific economic conditions of a country.

In practice, it is difficult to find the optimal tax rate by just using the Laffer curve, as it depends on multiple factors such as the degree of elasticity of labor and capital, the size of the informal economy, the level of welfare, etc. Furthermore, tax revenues are not the only factor that should be considered when designing a tax system, other factors such as fairness, redistributive effect, and incentive effects also play a big role.