Simplest answer: Interior Design provides a soul to a building or space and makes a space more functional pleasant and livable.
Interior design plays a big role in the everyday life. It introduces people to beauty, relaxation, and modernism. Interior design is an important technique that is given a high attention all over the world nowadays. The importance of designing interiors helps the person to learn a lot about the space, and how people feel comfortable while being at a specific place and using its facilities. Designing interiors makes people look at things around them in an open minded view. Designers see things from different perspectives due to their studies and work atmosphere. They give special attention to details.