Why should price to free cash flow matter to investors?
Price to free cash flow can tell an investor how the stock they're considering is priced compared to the actual money the company is making. Of course, this isn't a metric that's useful by itself, but when you compare price to free cash flow of your target company against its competition, a picture can emerge.
Companies with low price to free cash flow compared to their nearest competitors are often undervalued and may even be in value stock territory. Companies with high price-to-free cash flow ratios compared to their competitors may be at or near their price peaks, which is not the right time to buy anything.