In contrast, content sites commonly charge a fixed price per click rather than use a bidding system. PPC display advertisements, also known as banner ads, are shown on web sites with related content that have agreed to show ads and are typically not pay-per-click advertising.
A service-level agreement (SLA) is a contract between a service provider and its internal or external customers that documents what services the provider will furnish.
Â­One thing almost every legitimate Web site has, whether it's Facebook, Hulu or Google, is what's called the terms of service agreement, or ToS. It's different for every site, but, simply put, a terms of service agreement is a compact you make with a company while you use that company's Web site. It defines the relationship you have with the company, including a set of rules that lays out clearly what you can and can't do with the site.