Welcome to the forum Ryan. The root of weight loss is driven by calories - you need to be burning more calories than you are consuming in order to lose weight. This can be done by increasing the amount of calories you're burning (working out or doing cardio), or by decreasing calorie intake (eating less food).
This is the foundation of weight loss/fat loss. If you give us some info about yourself (height, weight, age, training experience, etc.) we would be able to steer you in a better direction and provide better advice.