PDF (adobe.com)

Ways to reuse graphics and text

InDesign offers several different ways to repurpose graphics and text.

Snippets
A snippet is a file that contains objects and describes their location relative to one another on a page or spread. (See Use snippets.)

Object libraries
An object library provides a convenient place to store items such as logos, sidebars, pull-quotes, and other repeating items. (See Use object libraries.)

Templates
A template is a document that includes placeholder text and graphics. (See Use document templates.)