From latin introductĭo, the introduction is the action and the effect to introduce or to enter (enter a place, put or insert one thing into another, drive someone inside a place). The concept can be used to refer to the preparation which is made to achieve a certain purpose.
Examples: "after a ten minute introduction, the president has begun to talk about the main theme of the meeting», «I don't want introductions, go directly to what interests», «the teacher gave a brief introduction and then explained the lesson of the day»
The introduction is also the preamble of a publication: "the novelist says in the introduction to his book that he is inspired by actual events", "the Russian scientist has stated in the introduction to his work that he didn't disrespect to that whatsoever in his research.
The introduction features depend on the kind and the format of the work. In his essay, the introduction is the opening section where the author explains the objectives of the contents included in its text. The introduction is followed by the body (with the development of the topic) and conclusions.
The introduction can include explanations on the topic of the text and a review on topics related to the central theme.
In the field of music, the introduction is the first part of an instrumental work. Normally, it is a brief part, short: 'the composer included an introduction with violins and harps before the piano solo ".