im doing an assignment on web 2.0 and having a hard time trying to understand some of the thing that i read online

can you guys help me explain on this differences that i found between web 1.0 and web 2.0

Differences between Web 1.0 and Web 2.0?
“Web 1.0: It is a billboard ad about your business.
• Flat and passive pages
• No interaction
• Basic information
• Costly to update and maintain
• Not user-friendly
Web 2.0: It is a front door into your business.
• Engaging, dynamic and interactive tools
• Databases (research, documents, newsletters, customer information…)
• Reusable (green) pages and templates
• Searchable
• Easy to locate
• Forms (for orders, inquiries…)”

I also having trouble finding the characteristic of web 2.0.
something like the openness and flexibility of the web 2.0.is there more characteristic out there for web 2.0??

thanks for the help