Cách sử dụng
The expression "flag up" means to draw attention to something important so that people can notice it or take action. People usually use this expression when they want to highlight an issue or a problem that needs to be addressed. For example, if you notice an error in a report that your colleague has submitted, you can "flag it up" to your supervisor so that they can correct it. Additionally, if you find an error in your bank statement, you can "flag it up" to your bank so that they can investigate and resolve the issue as soon as possible. Therefore, you should use this expression when you want to bring something important to someone's attention so that they can take appropriate action.