The Use-by date gives you an idea of how long you can safely consume food. It should be eaten or thrown away by the Use-by date as after that date the food is not safe to eat, even though you may not see any signs of spoilage like mould or an off-smell. Do NOT consume the product after its Use-by date has run out. For health and safety reasons, it is illegal to sell food once past its use-by date.
Use-by dates are generally found on perishables and short-shelf life foods such as fresh meat packed at the supermarket, packet ham and other deli meats, milk, yoghurt, custard and dairy products as well as many ready-to-heat products like chilled pasta sauce or garlic bread.
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Use-by date on fresh milk in supermarket 7-8 day shelf life |
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Use-by date on chilled French onion dip in supermarket deli cabinet 14 day shelf life |
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Use-by date on packet of shaved ham from the supermarket deli cabinet 30+ day shelf life |
A product will remain fresh and of good quality right up to its Best-before date (and sometimes beyond) if it is properly stored, both at home and at the supermarket. The food is not spoiled immediately after the date and can still be sold if in good condition. However its quality has begun to decline. Most cereals, biscuits, snack foods, flour, eggs, canned and frozen foods are labelled with a Best-before date.
The photo shows a muesli bar pack stamped with a Best-before date. This date marking is typical of packaged foods. It has a 4 month shelf life.
If you're unsure of whether to eat it past the Best-before date, use the look-and-sniff test. If the food looks and smells as you would expect, it should be safe to eat.

A Baked-on date is usually found on bread, muffins and cakes with a shelf life of less than 7 days so you can tell how fresh they are.
See the shot of crusty bread with a neck tag giving the date plus a supermarket bread listing both a Baked-on AND a Best-before date.
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