In 2002, the Sabremetric revolution started with Billy Beane in Oakland. Now, teams are able to access a ton of data involving pitch descriptions, quality of contact, spray charts, etc. With MLB installing Statcast the last few seasons, some of the data that MLB teams have used for years is available for fans to read and digest. Like any other stat, a number without context is just a number and nothing else. However, I do think the data is very useful if you know what you’re looking for.
In the individual game feeds on baseballsavant.com, each batted ball has an exit velocity, launch angle, and hit probability attached to it.