Keep an eye on it

Meaning

A request to watch something closely to ensure nothing goes wrong. It is the standard operating procedure for any task involving a timer or a simmering pot.

Practical, cautious

Used in a sentence

• I am heading to the garage, so please keep an eye on the oven.
• The stock market looks shaky today so I will just keep an eye on it.
• Keep an eye on the toddler while I answer the phone.