Camps, Showcases, or Combines are generally broken into 3 phases. The first phase is the speed and agility testing. 40 yard times, 5-10-5 shuttles, 3 cone drills, 3 hops, to go with height and weight measurements, hand size and generally wing span. All of these tests to create comparisons as to how you place against others in your same position group. Those that want to place at the top in these tests train with trainers with the goal to achieve the fastest times. Be prepared to work these drills year round and as often as you can. Keep baselines and follow on social media the top recruits in your area from your class and the classes ahead of you. Those that have posted the fastest times at a camp will generally post those times on their social media accounts. This can help you know just how fast you need to be.
The second phase is the coach-ability phase. This is where offensive and defensive drills are run with coaches from the specific position group to see how well you can take on the field training and feedback. Being open to trying new techniques, showing quickness in applying new things, and paying attention with both your eyes and ears is how you can gain the advantage. Pay attention to the feedback the coaches give to you and the other players in your group and apply what you see and hear. No coach wants to have to repeat themselves and they want to see how fast you can pick up what they are putting down.
The third phase is for competition. The competition tests will be different for each position group but with the intent to drive to certain outcomes. This is where you showcase you knowledge of your position by showing you know your progressions and positioning, your drive to compete against the best players the camp or showcase has to offer, and your hunger to take reps. Most times there are no defined lines and the number of reps will not be divided equally. Those that want more will fight to take it. Coaches pay attention to who puts themselves on the line most.
If you want to leave your mark at a camp, showcase, or combine you need to win all 3 phases. These competitions are money makers for the schools directly or the company running the event. Most will be open to all for participation which will bring players in from all skill levels. Groups can be large in number which will lead to smaller counts of reps. To get full advantage of the camp or showcase make sure to have had communication with the coaches before signing up. Having them expecting you and having seen your highlights will put you ahead of your competition. Combines generally won't have coaches present, they are intended as gateways to large events or specialty games with the promise of larger media review. These opportunities could lead to receiving stars by media outlets like 247 Sports or Rivals.
School specific camps are also used to get players of interest on campus. To gauge the interest of the player to see if they are willing to travel to be on site. It can be the difference maker for coaches as they filter their lists of prospects for scholarship opportunities.