These words are used to indicate the level of hazard associated with a product.
* "DANGER" is used for the most severe hazards, where exposure can cause immediate and severe injury or death.
* "WARNING" is used for hazards that could cause serious injury or death, but with less immediate danger.
There are other signal words used on labels, such as "CAUTION" and "NOTICE", but these two are the most common and indicate the highest levels of risk.