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1) When major events interfere with production, they drive producers to change prices and makes markets have to adjust quickly.
2)Prices give markets the opportunities they need to reach equilibrium even when the market is changing.

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1) When opportunity cost is high, people tend to think carefully before spending  their money.
2) By examining the price of a product, you can understand the quality of the product, and realize who the producers intend that their marketers will be.

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1) Changing prices motivate producers to produce more, and encourage new firms to enter the market.
2) The opportunity to earn a higher “price” can inspire people to enter the workforce of higher-paying jobs.

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1) The most important role of a price of a product in a market based economy is to use resources as efficient as they can, to those who are willing to spend that price for such product.
2) The demand of a product will drive producers to produce more and get the amount needed in order for them to meet their markets demand.