PageRank is Google's name for their link analysis algorithm. Web pages in Google's search index are given a PageRank, a number between 0 and 10, that signifies that page's overall relevance. The algorithm that determines a page's PageRank is a complex mathematical algorithm that counts backlinks pointing to a page as a "vote" for that page by the linking website.
In general, the more backlinks a web page has, the higher it's PageRank will be (the number is calculated in relation to all other elements in the set, in this case, all other web pages in Google's index).
Also known as 'pay-for-performance', 'paid search', 'paid advertising', 'pay-per-ranking', 'pay-per-placement', 'pay-per-position', 'search marketing'.
Paying for rankings as opposed to gaining organic rankings owing to web site merit, i.e. content, relevancy and link popularity.
Perl is a computer programming language which is used on the web for CGI scripting, although it's applications aren't limited to the web.
PHP is a computer scripting language mainly used for server-side scripting. PHP is freely used on the web as free software.
PHP is widely used, and is ideal for web development due to it's easy blending with HTML, and nearly universal server support.
When used in the context of paid search, phrase match describes a keyword or key phrase that shows ads for queries that include the key phrase, in the exact order specified, but allows for leading or trailing terms.
For example, the phrase matched key phrase "dell computers" would include all of the following queries:
broken dell computers
dell computers for sale
dell computers are terrible
i love dell computers
In the Google Adwords program, a keyword is phrase matched when it is enclosed in quotation marks: "example".
A piece of software that extends the capabilities of a main application. For example, the WordPress platform has many plugins that extend it's capabilities, including e-commerce, SEO, and other specific functionality that is not included in the core software package.