1. Explore the information about creating tweets.
2. Write a tweet describing your online course: explain the goal and outcomes of the course; be compelling and persuasive.
3. Review the works of at least three of your peers analysing brevity of the message, persuasiveness, relevance to the brand, and expressiveness.
The primary goal of reviewing the work of your peers is to broaden your perspective and deepen your own thinking about this topic.
This example may kindle some ideas: