How does a portfolio model based on product life cycle and the market share development index help

Question:

How does a model based on product life cycle and the market share development index help a growth business like Groupon.com?
Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...