For instance, it is possible to determine the increase or decrease in the general price levels by looking at the national income figures. National economies can use national income figures to determine how much income individuals are spending on consumption goods and hence their levels of saving. With such information, national governments can come up with ways of keeping inflation and deflation in check based on investment, saving and consumption figures. Third, national economies can determine the economic positions of their countries through a comparison of their GDPs with those of other nations. If a nation's GDP is significantly lower in comparison to that of other nations, it becomes clear to policy makers that the standards of living of individuals in such an economy could be low. Further, GDP figures in this case can be used to determine the purchasing power of individuals. If the GDP results in this case present a not so appealing...

To investors, the rate of GDP growth is important as it helps them determine whether or not to adjust their asset allocation. Investments help in the creation of employment opportunities in a given country. Hence for purposes of attracting investment (mainly external), national economies prefer appealing GDP projections.
Conclusion

In conclusion, it is clear that GDP is one of the most relevant and widely used economic indicators. In that regard, what really matters as far as a nation's GDP is concerned is its growth. In that regard, increasing GDP remains one of the main priorities of national economies.

References

Sexton, R.L. (2010). Exploring Macroeconomics. Cengage Learning.