"Better predictions" refers to being able to more accurately forecast or anticipate future outcomes or events. It means having a higher success rate in guessing what is most likely to happen in the future. Full definition
People who do this for a living can indeed make good predictions of the type you asked for. (jennifermarohasy.com)
This, in turn, allows them to make better predictions about how climate will change in the future. (sciencedaily.com)
By looking into the past behavior of employees, organizations can make better predictions about how that individual will behave in the workforce and this information can lead to better hiring decisions. (proformascreening.com)