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PageRank (PR)

A website’s pagerank is a value given to a webpage which is intended to rate the authority of the page. Websites are awarded a pagerank of between 0 and 10 which is determined by an algorithm that takes into account the inbound and outbound links for a webpage, and the authority level of the sites that are linking to or being linked to. Google originally put a heavy emphasis on pagerank when ranking websites in their results pages. Recently it has become less important but it is still definitely taken into consideration.
 

Pay Per Click (PPC)

Pay per click is a form of online advertising whereby the advertising site pays a pre-defined amount of money to the advertiser each time someone clicks on the link in the advert. Most search engine advertising works on this structure, such as Google’s AdWords and Yahoo’s Search Marketing. The advertiser will typically create an advert and submit it to be included alongside particular keyphrase searches. Each time a visitor clicks on the link contained in the advert the site owner pays a set amount to the advertising company.
 

Pay Per Action (PPA)

This is a form of advertising very similar in structure to PPC. The key difference here however is that the company placing the advert only have to pay if the click through to the website results in a sale (or other predefined conversion).
 

PHP

PHP is a scripting language that is commonly used in the design of websites. Often PHP queries can result in code-filled URLs. This is undesirable for SEO so ideally you will want to use a mod that allows you to rewrite these URLs to something related to the page’s keyphrases which will be noticed by search engine spiders and understood by visitors.
 

Personalisation

Many search engines personalise results based on a number of factors such as location, recently viewed content and search history. The idea behind this is that it allows the search engines to provide results that will be as relevant to the searcher as possible.

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