Bottom line an economy is the result of a mix of human planning and coordination of scarce resources over time to attempt to best provide the endless variety of wants and needs we all have.
If we invest the right amount into the right investments today we can achieve growth as there is more for more people. When we invest the wrong amount into the wrong things we find ourselves less able to satisfy the wants and demands of society at prices people can afford.
Our ability to make these investment decisions are as good as the signals we use to make them such as prices. (Kinda like you use weather forecasts to plan what clothes to wear and bring an umbrella). In the same way a bad forecast signals you to dress too light or too warm, bad price signals result in misplaced capital.