A metric that indicates whether a website is achieving its goals.
A word or words used by a searcher on a search engine. In SEO, keywords are the words that a website is optimised to rank for, and in PPC, key- words are bid on by advertisers.
The number of times a keyword or key phrase appears on a website.
More than one keyword can be referred to as a keyword phrase.
This term refers to where the keywords/phrases targeted by SEO rank amongst the search engines - if your targeted terms do not appear on the first three pages, start worrying.