To provide timely and personalized support to learners, you need to use multiple modes of communication that suit different preferences, needs, and situations. For example, you can use email, phone, chat, video call, or social media to communicate with your learners individually or in groups. You can also use asynchronous or synchronous communication depending on the urgency, complexity, and purpose of your message. For example, you can use asynchronous communication to provide general feedback, reminders, or announcements, and use synchronous communication to provide specific feedback, clarification, or coaching. By using multiple modes of communication, you can reach your learners more effectively and efficiently.