Why entity relationship diagram is important?

This entity relationship diagram drawn when designing a database system. It is normal that, after the systems specification, this diagram is drawn showing the conceptual design of the database. ERD or entity relationship diagram shows the type of information that is to be stored in the system and how these information associate with each other.When creating, the entity relationship diagram this will give a perfect view of all database elements. This visual representation is really easy to understand and in the same time this diagram can be shown and explained to user representatives for confirmation and approval.