A good Interior Design is important for a number of reasons:

1. Aesthetics: A well-decorated room can be visually appealing and enhance the overall aesthetic of a space.
   
2. Functionality: A well-decorated room can be functional and meet the needs of the people who use it. For example, a bedroom should be decorated in a way that promotes rest and relaxation, while a living room should be decorated in a way that encourages socializing and relaxation.
   
3. Mood: The way a room is decorated can affect the mood and atmosphere of the space. For example, a room decorated with bright colors and bold patterns may be more energizing, while a room decorated with softer, neutral colors may be more calming.
   
4. Personalization: Decorating a room can be a way to personalize and make a space feel like home. It can be a way to express your personal style and taste, and to create a space that reflects your personality and interests.
   
5. Resale value: A well-decorated room may have a higher resale value if you decide to sell your home in the future. And it can make a home more attractive to potential buyers and increase its value.

Overall, a good room decoration with arts is important because it can contribute to the overall aesthetic, functionality, mood, personalization, and value of a space.