Answer:
The answer is Keep your IM presence status up-to-date.
Explanation:
Instant messaging (IM) and texting are a type of online chat that offer real-time text transmission over the Internet. In this situation, short messages are typically transmitted between two parties almost instantly, and this is done when each user chooses to complete a thought and select send.
Therefore, since it is an instant medium of sending and receiving messages, in order to make sure that people waste no time in reaching you, you must keep your IM presence up-to-date. What this basically means is that you should always be available and online, so that the moment you receive a message, you will waste no time in responding to the message, and therefore, save the time of the person trying to reach you.