Modeling is about graphical presentation that enables members of your organization to understand and communicate about the rules of and processes of business. Business Modeling and Data Modeling are the two of the most important types of modeling. This is also considered to be an efficient and very effective way to represent the needs of an organization.
Business processes are explained as a set of activities occurring internally or externally in an organization that work together to achieve a business.
Representing as a concept of data structure (tables) necessary for database, this is a very powerful model of communicating business requirements.
According to Inmon, famous author for several data warehouse books, "A data warehouse is a subject oriented, integrated, time variant, non volatile collection".
Metadata is data about data and Metadata tools are used for gathering, storing, updating, and for retrieving the business and technical metadata of an organization.