“Activities” is one of the new features of Internet Explorer 8 (IE8). Activities in Internet Explorer 8 are contextual services that provide quick access to external services from any webpage.
The external pages are the Service Providers from whom we can lookup for Information related to data in the current page.
Alternatively, we can send content or data from the current webpage to another application (say Windows Live).
I’ve used some third-party tools that was able to perform searches but this is more an enhanced version which covers different categories of contents and information and how we want to handle information than just a mere search.