What makes a good TED Talk?

A good TED Talk is a presentation where the speaker manages to engage the audience and catch their attention with a specific subject. The speaker has to know a great deal about the subject and must be comfortable with it. One of the fundamentals a TED Talk must have is a good amount of visuals, in order to explain the topic more clearly to the audience. However, there cannot be an excessive amount of visual aids due to the effect of the presentation feeling more like a movie. Every TED Talk must end with a takeaway that the speaker wants the audience to learn, which is basically the core principle of the talk.