Write what you think about a quality forecast, its role in a gaming system and the methods of its construction.
It doesn't matter what you think, it's what you do when you read a quality prediction that you agree with... I usually follow it and place a bet.
I don't know what you mean by "construction"... any prediction is ultimately just a prediction. It may come true or it may not. Who knows? That's why we gamble & place bets. It's not like you can "construct" some special system/strategy with some laws & logic that will bring profit in the long run. Or maybe you can? We are all trying different things, but it's not an exact science, the luck factor is always present.
On my end, a quality forecast is a prediction based on some strong foundations - history, knowledge about the athletes, coach, their strategies, other variables such as weather conditions, injuries of athletes that may have an effect in their performance. So if you are a long-time sportsbettor, I believe, you have a lot of knowledge about the sports you are betting in. That when you predict, you are somehow having a quality prediction based on the years of your experience and knowledge that you have for the sports.