A lightning talk is a very short presentation given at a conference or similar forum. Unlike other presentations, lightning talks last only a few minutes and several will usually be delivered in a single period by different speakers.
The YAPC (Yet Another Perl Conference) 19100 Conference came up with the term “lightning talk” at Carnegie-Mellon University in Pittsburgh. The term was first coined by Mark Jason Dominus in June 2000.The practice of lightning talks was first known to be used at the Python Conference in 1997, but wasn’t named until the The YAPC 19100 Conference. 
Definition and Format
Lightning talks are designed to be short presentations between five to ten minutes long, but are usually capped at five minutes. Most conferences will allot a segment of roughly 30 to 90 minutes long to speakers. Talks are arranged one after the other during the sessions. The talks are usually given at conferences in order for the event to have many speakers discuss a multitude of topics. The conferences are held in order for individuals to be able to share their ideas and concepts to people who have experience in the specific field.  Lighting talks are brief which requires the speaker to make his or her point clearly and rid the presentation of non-critical information. This causes the audience to be more attentive to the speaker and gain a broader array of knowledge from the presentations given.
The format of lightning talks varies greatly from conference to conference.  Slides may be discouraged, and a single computer running a Presentation program is used by all speakers. In general lighting talks are given in a format that can include slides but if so, the speaker must be careful not to read the details which they include.
The term data blitz is sometimes used to refer to a session of lightning talks, particularly at academic conferences in the sciences and social sciences such as the annual conference of the Society of Personality and Social Psychology.
The goal of lightning talks are to demonstrate a topic in a quick and insightful manner. The main point of a lightning talk is the delivery of the presentation, not necessarily the content in it. The significance of these concise and efficient talks is to grab audiences attention. The short presentations are also important because they allow people to understand mass amounts of information in such a short amount of time. 
- "Talks that were presented at YAPC 19100". Retrieved 2007-01-27.
- Berkun, Scott (January 14, 2010). "The End Of Boring Presentations". Forbes.com. Forbes. Retrieved January 14, 2010.
- Dominus, Mark. "Reports From YAPC 19100". Perl.com. Retrieved 3/12/14.
- Fowler, Mark. "Giving Lightning Talks". Perl.com. Retrieved 12 March 2014.
- Corkey, Joe. "Why You Should Give a Lightning Talk". Business of Software. Retrieved 12 March 2014.
- "Lightning Talks". http://perl.plover.com/. Retrieved 12 March 2014.
- "ERSI International User Conference". Esri. Retrieved 13 March 2014.
- "SPSP 2012 Data Blitz". SPSP 2012 Conference. The Society for Personality and Social Psychology. Retrieved 29 December 2012.
- "Giving a good lightning talk". Software Sustainability Institute. Retrieved 12 March 2014.
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