trainer

A trainer is a person or a device that helps someone learn new skills or improve existing ones. In the context of fitness, a trainer is a professional who guides individuals through exercises to achieve health and fitness goals. In technology or software, a trainer can refer to a program or system that prepares a machine or algorithm to perform its tasks more effectively, often by providing it with examples to learn from. Overall, a trainer facilitates learning, skill development, or performance enhancement through guidance, instruction, or training tools.