The key characteristics of Web 3.0 include:

1. Decentralization: Web 3.0 is built on blockchain technology, which allows for peer-to-peer transactions and data sharing without the need for intermediaries like governments or corporations.
2. Artificial Intelligence (AI): Web 3.0 incorporates AI and machine learning to enable more intelligent and personalized interactions between users, devices, and data.
3. Blockchain: Web 3.0 uses blockchain technology to create a secure, transparent, and immutable record of transactions and data.