Adware or advertising-supported software is any software package which automatically plays, displays, or downloads advertising material to a computer after the software is installed on it or while the application is being used. Some types of adware are also spyware and can be classified as privacy-invasive software.
Adware is software with advertising functions integrated into or bundled with a program. It is usually seen by the programmer as a way to recover programming development costs, and in some cases it may allow the program to be provided to the user free of charge or at a reduced price. The advertising income may allow or motivate the programmer to continue to write, maintain and upgrade the software product.
Adware can also download and install apps to your computer. Here are some things adware can do:
Programs have been developed to detect, quarantine, and remove spyware. As there are many examples of adware software that are also spyware or malware, many of these detection programs have been developed to d etect, quarantine, and remove adware as well. Among the more prominent of these applications are Ad-Aware and Spybot - Search & Destroy. These programs are designed specifically for spyware detection and will not detect viruses, although some commercial antivirus software can also detect adware and spyware, or offer a separate spyware detection package.
Pay per click (PPC) is an advertising model used on search engines, advertising networks, and content websites/blogs, where advertisers only pay when a user actually clicks on an ad to visit the advertiser's website. Advertisers bid on keywords they predict their target market will use as search terms when they are looking for a product or service. When a user types a keyword query matching the advertiser's keyword list, or views a page with relevant content, the advertiser's ad may be shown. These ads are called a "Sponsored link" or "sponsored ads" and appear next to or above the "natural" or organic results on search engine results pages, or anywhere a webmaster/blogger chooses on a content page.
Pay per click ads may also appear on content network websites. In this case, ad networks such as Google AdSense and Yahoo! Publisher Network attempt to provide ads that are relevant to the content of the page where they appear, and no search function is involved.
While many companies exist in this space, Google AdWords, Yahoo! Search Marketing, and Microsoft adCenter are the largest network operators as of 2007. Minimum prices per click, often referred to as Costs Per Click (CPC), vary depending on the search engine, with some as low at $0.01. Very popular search terms can cost much more on popular engines. Arguably this advertising model may be open to abuse through click fraud, although Google and other search engines have implemented automated systems to guard against this.
PPC engines can be categorized into two major categories "Keyword" or sponsored match and "Content Match". Sponsored match displays your listing on the search engine itself whereas content match features ads on publisher sites and in newsletters and emails. [2]
There are other types of PPC engines that deal with Products and/or services. Search engine companies may fall into more than one category. More models are continually evolving. Pay per click programs do not generate any revenue solely from traffic for sites that display the ads. Revenue is generated only when a user clicks on the ad itself.
Google started search engine advertising in December 1999. It was not until October 2000 before the adwords system was introduced, allowing advertisers to create text ads for placement on the search engine. However, PPC was only introduced in 2002, until then, advertisements were charged at cost per thousand (CPM). Yahoo Advertisements have always been PPC, since its introduction in 1998.