Cách sử dụng
The expression "by the way" is used when you want to mention something that's not directly related to the current topic of conversation. It's like an additional piece of information that you want to share with someone. For example, "We're going to the beach tomorrow. Oh, by the way, have you packed sunscreen?" You can use it in casual conversations with friends or even in formal settings like a business meeting. Just remember to use it appropriately and not interrupt the flow of the conversation.