Intros and Overture

Overture and intros are semantically related. in introduction topic. In some cases you can use "Overture" instead a noun "Intros", when it comes to topics like something new, beginning of event.

Overture noun - A performance, activity, or event that precedes and sets the stage for the main event.

Intros and overture are semantically related. Sometimes you can replace term "Intros" with "Overture", this nouns are similar.