Banned: Also known as delisted or blacklisted, a banned site is a URL that has been removed from a search engine's Index, typically for engaging in Black Hat SEO. Banned sites are ignored by search engines. Banner Ad: A banner ad is a rectangular graphic advertisement. Banner ads are one of the commonest forms of online advertising. Their sizes vary, but most measure 468 pixels wide by 60 pixels high. Clicking on a banner ad will direct you to the advertiser's website or a designated Landing Page. Black Hat SEO: Black hat SEO is the term used for unethical or deceptive optimization techniques. This includes Spam, Cloaking, or violating search engine rules in any way. If a search engine discovers a site engaging in black hat SEO it will remove that site from its Index. Blacklisted: Also known as banned or delisted, a blacklisted site is a URL that has been removed from a search engine's Index, typically for engaging in Black Hat SEO. Blacklisted sites are ignored by search engines. Broken Link: Also known as a dead link, a broken link is a link that no longer points to an active destination or Landing Page. Search engines dislike broken links. Keeping all of your site's links active is an important part of ongoing optimization. Click Fraud: Click Fraud is the illegal practice of manipulating Cost-Per-Click (CPC) or Pay-Per-Click (PPC) revenue sharing agreements. There are numerous types of click fraud, but in a typical scenario the webmaster of a site that earns money from each click of the advertising links it publishes pays individuals a small fee to click those links. Companies thus pay for advertising to clients who had no intention of buying from them. Some companies have filed class action lawsuits alleging that ad publishers such as Google and Yahoo! have failed to aggressively confront click fraud because they benefit from increased CPC revenue.
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