The person appears to be a/an White Male, approximately 20 to 29 years old.
Key mistakes to avoid when delivering a presentation in a professional or academic setting include: lacking a clear and logical structure, going off-topic instead of staying focused, speaking too quickly or unclearly, failing to maintain eye contact and use effective body language, neglecting to incorporate visuals or engage the audience, not practicing sufficiently and being unprepared with the material, overwhelming the audience with too much information, skipping pauses for questions, and not concluding with a strong, actionable summary.
Common mistakes to avoid when giving a presentation in an academic or professional setting include: not having a clear structure, rambling instead of staying on topic, speaking too quickly and unclearly, lacking eye contact and effective body language, failing to use visuals or engage the audience, not rehearsing adequately and not being familiar with the material, overwhelming the audience with too much information, neglecting to take pauses for questions, and not preparing a strong, actionable conclusion.