MotoGP riders have three primary objectives on their todo lists on the Saturday of a Grand Prix weekend. First make sure you end FP3 in the top ten combined times and ensure passage directly to Q2. Secondly, use FP4 to figure out which tires will work best for them in the race, and what to expect in terms of performance at the start, drop in performance after the first five or six laps, and then the second drop in the last third or so of the race. And finally, to find a way to exploit the potential performance of a soft rear tire to secure a spot on the front row of the starting grid. Pole position would be nice, but second or third will do almost as well.
There are plenty of hurdles to cross along the way, not least figuring out how to get the most out of the package they have underneath them. But some of the challenges are outside of their control. Such as the tendency for their fellow racers to crash in the final minutes of a session, bringing out the yellow flags and automatically costing them a chance at setting a fast lap.