What is junk food?
'Junk foods' are foods that lack nutrients, vitamins and minerals, and are high in kilojoules (energy), salts, sugars, and fats. Junk food is so called because it doesn’t play a role in healthy eating, especially if it's eaten to excess. Junk food is also known as discretionary food or optional food.
Some examples of junk food include:
cakes and biscuits
fast foods (such as hot chips, burgers and pizzas)
chocolate and sweets
processed meat (such as bacon)
snacks (such as chips)
sugary drinks (such as sports, energy and soft drinks)
alcoholic drinks
Read More: https://www.healthdirect.gov.au/junk-food-and-your-health