This is a speech about business commutation class, the topic is “Social Media”, the speech better to but not necessary includes:
1. What role does it play in business communication,
2. Give an example, like a company, twitter, Facebook, or others.
3. Explain the importance of social media in business communication.
Except these, you can expand more contents until it can be presented 7 mins.
The content has to be logical and keep staying on topic, which are very important.