The phrase "to stay safe" means to take measures or precautions that will prevent harm, danger or loss. It is a common expression used to encourage people to be cautious and take steps to protect themselves, their property or others from potential risks. This can include behaviors such as wearing a seatbelt while driving, locking doors and windows when leaving the house or using caution while performing a task. The phrase is often used in the context of personal safety, but can also refer to the protection of property or other assets.