The best single word that can describe today's business is "Changed." This is because the business landscape has undergone a significant transformation over the years, and this transformation has affected every aspect of business operations.

Reasons why "Changed" is the best word to describe today's business:

1. Technological advancements: The rise of technology has changed the way business is conducted. Companies must now adapt to technological changes to remain competitive.

2. Globalization: The world has become increasingly interconnected, making it easier for businesses to operate across borders. This has opened up new markets, but it has also increased competition.

3. Consumer behavior: Consumers are more informed and empowered than ever before. They have access to more information and can quickly share their experiences with others. This has forced businesses to focus more on customer satisfaction and experience.

4. Environmental concerns: Climate change and other environmental issues have become a significant concern for many consumers. Businesses must now consider their impact on the environment and work to reduce their carbon footprint.

5. Remote work: The COVID-19 pandemic has accelerated the trend of remote work. Businesses must now adapt to this new way of working to remain productive and efficient.

In conclusion, the word "Changed" best describes today's business because of the various transformations that have occurred in the business landscape. Companies must adapt to these changes to remain competitive and meet the evolving needs of consumers.