Public speaking is a science of expressing and conveying your message effectively and efficiently. We must speak according to our audience. If you are talking in front of jargons (experts) do not go in details must used and speak in a summarise way but if you are talking with technicians and basic level employees talk accordingly. Know your audience before presentation. Reherse reherse reherse because practic makes a man perfect.
Thanks for sharing such a great tips @hamzayousaf.