A widget is a single html page that is served from the web server. The web page contains all the HTML necessary to make widget work properly, then the widget will link to a css file and a javascript file. Widget does not contain any embedded scripts or css. 

Originally Web widgets are link counters and ad banners earlier. Later, ad and affiliate network used code widget for distribution purpose.

 Widget Structure 

• Widgets have a name

• the name should be unique amongst all widgets.
• the name should describe the function of the widget

• Within the widget folder there will be an html page that contains the widget
• During development local copies of Javascript and css contained in widget development kit are used. Web Widget, Widget Development, Widget HTML Development, Widget Structure. A widget is a single html page that is served from the web server.

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