The best way to define widgets to make people understand them easily is that of comparing them with the usual ticker tapes that we often see in television. Getting the latest news on any genre like political or sports updates is what people will always want since they are useful for personal and professional gains.
Widgets still have to be properly introduced and explained to various people who are exposed over the web. If there is something that people need to be aware of, it is that of being adept with the latest in the technology industry. The various enhancements and new innovations are usually limited towards the people who are really technology conscious and it would be best to educate them what widgets truly are.
The best way is to make examples and illustrations so that they can appreciate them. Making them similar to what they actually see in the world will surely be something helpful.