The pricing strategies change in different stages of product life cycle. Two pricing strategies can be used in the introductory stage: market-skimming and market-penetration. Market-skimming pricing sets high prices to skim higher revenue from the market. Prices are dropped to attract new buyers after a while. In other words, prices are decreased step by step to sell the products to new consumers. In market-penetration pricing, companies set low prices to penetrate the market as much as possible.