Web 2.0 is an umbrella term that describes the shift from static pages to interactive websites and applications, thanks to advances in technology and connectivity. The defining features of Web 2.0 include user-generated content, multimedia posts, interactive websites and applications, web communities and social media, as well as Web applications such as wikis. Today, almost every website and application that is used on the web has some elements of Web 2.0.

By leveraging user-generated content and connecting people in new ways, Web 2.0 has revolutionized how people interact with the internet. For example, a site like Facebook allows its users to upload content, comment on news items, and make friends with people from all over the world. Similarly, Twitter enables users to share snippets of information with their followers, making news more personalized and up-to-date than ever before.

Web 2.0 has revolutionized the way businesses reach numbers of people. Advertising has also changed due to interactive technologies and social media. Companies can reach out to potential customers through a variety of platforms, from search engine advertising to sharing sponsored content on social networks such as Facebook and Twitter.

Moreover, Web 2.0 has enabled companies to directly gauge consumer behaviour and customise their products accordingly. For instance, many streaming services such as Netflix provide tailored recommendations based on past user behaviour. Additionally, Web 2.0 is enabling companies to interact with consumers and receive feedback in real-time. All these changes have made websites and applications increasingly sophisticated and more efficient.

In summary, Web 2.0 has enabled the boom of social networks, multimedia sharing, interactive websites and applications, and the rise of personalized services. Thanks to these advances, the internet has become an incredibly valuable tool in business, communication, and entertainment. It is reasonable to assume that Web 3.0 will continue to advance the web further, enhancing experiences and enabling innovation.