Losing weight requires you to make lifestyle changes such as watching what you eat. The easiest bad foods to eliminate from your diet are sweets and sugars because they naturally add on weight without helping your feel fuller.
Calories are the basis of what makes your body functional, giving you energy to perform at your best. When you are consuming sweets and sugars (candy, soda, fruit juice, and cookies), these empty calories do not necessarily provide you with fuel leaving you hungry and craving for more. Now with excess calories in your system, your body will automatically convert the calories to fat.
This is exactly not what you want when on a diet or weight loss plan. Start to take notice of what you put into your body.
If a food / snack fits into the empty calories food group, do not eat it and swap in something else.