OpenAI has introduced the Custom Instructions feature for ChatGPT, allowing users to define the behavior of the bot within conversations. This feature will enhance work efficiency and caters to various personal life needs. Users only need to set the instructions once in ChatGPT, and the bot will respond according to these instructions thereafter. Teachers can work more efficiently, and developers can program more conveniently. Additionally, user privacy is protected, as OpenAI deletes personal information before processing it. This new feature will be rolled out to all ChatGPT users, including those on the free plan.