Activities are contextual menu options which quickly access a
service from any Web page. Users typically copy and paste from one
Web page to another. Internet Explorer 8 Activities make this common
pattern easier to do.
Activities typically involve two types of scenarios: "look up" of
information within a Web page, and "send" of Web content to a Web
application. Consider the example of a user who is interested in a
restaurant and wants to see its location. This is the form of a
"look up" Activity, where the user selects the address and views an
in-place view of the map using a favorite map service.