PageRank (PR) – This is a Google tool that ranks pages in order of importance or relevance form 1 to 10, 10 being the most relevant. There are different parameters in play; for instance, a link from an important site (such as CNN.com) will rank higher than a link from a non-entity. The Google Toolbar includes a PageRank meter that indicates which pages are considered more important by Google. It is easy to move your page from position 2 to 3 by introducing additional links, but it is not so easy to move up from a 7 or a 8. Page Rank drives traffic; so it is an important tool.
Pageviews – Same as “Impressions.”
Paid inclusion – This refers to paying money to a search engine to include your web pages in that search engine's index.
Pay-for-performance – There are different modules promoted by Google that drive sales; Pay-for-Performance is one such that intends to provide focused clicks.
Pay-per-click (PPC) – Another sales model that is based on number of clickthroughs rather than impressions or other criteria; charges are priced on number of clickthroughs.
Pay-per-post (PPP) – This model helps bloggers find sponsors who will pay for specific content.
PDF – An acronym for Portable Document Format, this file format was developed by Adobe to provide a page exactly as it is uploaded without being modified or mutated by the computer used. It is most popular to upload documents that need to be printed without scope of tampering. In contrast, a document uploaded in HTML format may be subject to format or content change owing to the computer and web browser software used.
PHP – an "open source" web programming language that is used to build dynamic web sites. Microsoft's ASP (Active Server Pages), JSP (Java Server Pages), and Macromedia's Cold Fusion are others in the same league but not as popular. PHP is ideal for Web development and accepts being embedded into HTML. It is popular owing to its quicker response time, improved security, and transparency to the end user.
Phrase Match – This is a type of keyword matching in which the user’s exact phrase is matched to the ad even if additional words do not match. For instance, a search query ‘blue umbrella’ will show an ad with that product but if the query is ‘an umbrella with blue color,’ it will not connect to the ad.