In marketing, it is the name given to the visible face of an institution. It is the organization's way of expressing itself. This expression is a well-defined and generally immutable expression. The corporate identity book, which specifies to what extent and how a design that will remind the institution should be used, is an indispensable element of this system. So that; In a corporate identity design, it is specified in what dimensions and how everything will be used, from the emblem (logo) to the office design, from the clothing of the employees to the on-board printing, from the letterhead to the signboard, from the web pages to the death notices, from the packaging design to the annual report.