Stockopedia explains P/FCF, Last Yr...
Free Cashflow is the amount left over a company can use to pay down debt, distribute as dividends, or reinvest to grow the business.
This ratio is similar to Price to Earnings, but omitting purely "paper only" expenses.
Some companies report high profits, but they can't turn those profits into cash! A company can't survive without cash, and if it can't generate it internally it will have to go to outside investors to support it, resulting in either share dilution or increased borrowing.