What is Strength and Conditioning?
It's the practical application of sport and exercise research. The goal of an S&C coach is to improve the athletic qualities which determine success in a particular sport. A fairly big part of that is building resilience and robustness, a strategy which may reduce injury risk as well as creating the toughness needed to train consistently and productively.
Sounds too serious and involved for your level of sport? The very same principals that apply to professional athletes can be used to improve performance in recreational sportspeople, and even in occupational settings. S&C isn't a type of exercise or workout, it's the process and the method.