The market value of final goods and services equals the total amount that is spent to buy these products. these two measurements also equal total income earned by producers, economic growth, real output?

Real output

Real output is the cue where you can level up your products or service or try a new strategy for your business. The endpoint is that you need to diversify so that the customers will not get tired of the same product of service all over again. If you observed that with all the things you possibly did to keep the product or service growing, you haven't seen any change the market demand then the second thing you may want to do is to stop your business because it will only be a waste of time, research and money.