Wikipedia, the most populated online encyclopedia edited by internet users, has its 10th anniverary. In the US 42 % of the whole population has used the service to find some information, which is equal to 53 % of adult internet users. Some figures available for Germany are similar to those in the US with a degree of brand awareness of 93 % among internet users. It is one of the most popular internet services all over the world. It is indeed a great service and might be a valuable marketing tool, if one provides information about a company or a product interesting to the audience. An up to date survey of PEW Internet is dedicated to Wikipedia and has some further figures.
Directory Sources: Dictionaries and Encyclopedias