The official website of Tata Steel is www.Tatasteel.com.

Explanation:
Website Name:
The official website of Tata Steel is called Tata Steel. The name of the website is the same as the company's name.

Website Address:
The website address is www.Tatasteel.com. The address is a combination of the company name "Tata Steel" and the top-level domain ".com". The top-level domain ".com" is commonly used for commercial websites.

Importance of the Official Website:
The official website serves as a platform for Tata Steel to provide information about its products, services, and corporate activities. It allows the company to showcase its portfolio, highlight its achievements, and communicate with its stakeholders. The website also serves as a channel for customers to access product information, make inquiries, and potentially engage in business transactions.

Website Design and Features:
The official website of Tata Steel is designed to be user-friendly and visually appealing. It typically includes the following features:

1. Home Page: The home page serves as an introduction to the company and provides quick links to key sections of the website.

2. About Us: This section provides information about Tata Steel's history, mission, vision, values, and corporate governance.

3. Products and Services: This section showcases the various products and services offered by Tata Steel, including different types of steel, solutions for different industries, and value-added services.

4. Sustainability: This section highlights Tata Steel's commitment to sustainability, including its efforts in environmental conservation, social responsibility, and ethical business practices.

5. Investor Relations: This section provides information for investors, including financial reports, stock information, and shareholder services.

6. Careers: This section provides information for job seekers, including job opportunities, recruitment process, and employee benefits.

7. Contact Us: This section includes contact information for different departments and locations, allowing visitors to get in touch with Tata Steel for inquiries or feedback.

Conclusion:
The official website of Tata Steel is www.Tatasteel.com. It serves as an important platform for the company to communicate with its stakeholders, showcase its products and services, and provide information about its corporate activities.