An applied object is a part of the platform - a prototype used for solving a set of applied tasks.
For example, the applied object named Catalog allows adding the following business area concepts to the applied solution: "list of employees", "list of goods", "list of vendors", and so on. An applied object is a composition of 1C:Enterprise script types and objects, infobase tables, applied functionalities, etc. It is a basic configuration building block. When developers create a configuration, they add applied objects to the configuration, specify their properties, and then describe their specific algorithms in 1C:Enterprise script.