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The Scenario: Your boss asked you to attend a workshop (training session) on technical writing.
The Scenario: Your boss asked you to attend a workshop (training session) on technical writing. To ensure the company got its money's worth, you are required to report back to your boss, in your own words, the three "big ideas" that you picked up from your training (that is, Chapter 3).
To be credible, discuss the topics (that is, do not merely list them) in enough detail that your boss is convinced that you will be able to successfully apply what you learned to your job. (Proofread! I expect your answer to be well written. Make it "boss ready." You want your boss to be glad they hired you and invested in you.)