Intro
Intro is a shortened form of introduction and is used to refer to the opening part of a document, speech, piece of music, film, or other work. It can also describe a short opening segment, such as a jingle or title sequence, that sets the stage for what follows.
In writing and speaking, the introduction provides context, states the purpose, and outlines what will be covered.
In music and film, an intro designates the opening passage or sequence that establishes mood, tempo, key,
In broadcasting and online communities, intros function as lead-ins: opening segments, intro videos, or introductory posts
Related terms include introduction, prologue, and preface, which have specialized uses in literature and academic writing.