A more thorough explanation:

The one-party consent rule is a principle that allows one person to secretly record a conversation without the other person's knowledge or consent. This rule applies to most states in the United States, but not all.

For example, if you are on the phone with someone and you want to record the conversation, you can do so without telling the other person. As long as you are part of the conversation, you are allowed to record it.

Another example is if you are in a meeting with someone and you want to record the conversation, you can do so without telling the other person. However, if you leave the room and leave your recording device behind, it is no longer considered a one-party consent situation.

The one-party consent rule is important for people who want to protect themselves in legal or personal situations. However, it is important to note that some states have different laws regarding recording conversations, so it is always best to check your state's laws before recording any conversations.