In online advertising, click fraud involves sending fraudulent clicks to Cost-per-Click (CPC) advertisers. The clicks can be artificially generated via automated technology methods (such as hitbots) or via manual clicking for the purpose of debiting CPC advertiser accounts or increasing CPC network partner/affiliate commission revenues.
Click fraud occurs in pay per click online advertising when a person, automated script or computer program imitates a legitimate user of a web browser clicking on an ad, for the purpose of generating an improper charge per click.
Notable is that also "Fandom by Wikia", owned by Jimbo Wales of Wikipedia, is hosting click fraud advertisements. For example, when you navigate from an italian mobile connection, advertising to inconsistent payed services by SMS shows up (also vibrating), and if you just misclick once it charges 5 Euros per week from your telephone credit. This happening in this very Wikia platform, for every argument (enciclopedias about videogames, TV shows, books, etc...). Be warned guys.