What are the best cash flow businesses?

The best cash flow businesses are the ones where the day to day running costs are low and the market position is high. They will be receiving regular sums of cash into the business but will be paying out much less, this will generate a good cash flow. Examples include freelancing, consultancy, online and service industries with minimal overheads.

What are the 3 types of cash flows? What is a cash flow example? Does cash flow include salaries? How do you explain cash flow? How is cash flow calculated? Why is cash flow so important? What is considered a good cash flow?