About Widgets and how you could use it

According Wikipedia the defining characteristic of a widget (or control) is to provide a single interaction point for the direct manipulation of a given kind of data. Widgets are basic visual building blocks which, combined in an application, hold all the data processed by the application and the available interactions on this data. A well known example is the Google Adsense programme at which contextual ads pop up at your website. AdSense automatically crawls the content of your pages and delivers ads that are relevant to your audience and your site content—ads so well-matched, in fact, that your readers will actually find them useful.
Widgets offer you the opportunity to distribute your information fast to all kind of external websites. And this technique can be brilliant copied to social networks and blogs like facebook, foundercontact, blogger and many other platforms.

DMNews describes 'how Bacardi now promotes its rum to social network users that are old enough to drink. In an example of a company creating a widget that fits the brand, it worked with technology firm Buddy Media to create an online party widget called the Bacardi Mojito Party. Since its inception a week ago, more than 100,000 Facebook members have installed the new branded application, that Buddy Media calls an “app-vertisement,” on their pages'. So this sounds wonderful web 2.0 with smart user participation!