Keyword: Keyword is a word or a phrase that is typed on a search engine search query, for example keywords in sports website are Sports, cricket sports, baseball sports.

Keyword Density: A measurement of number of times a keyword is repeated in the webpage from top to bottom of the page.

Keyword Phrase: Combination of two or more keywords to form search query. It is a Search made up of keywords.

Keyword Research: Determining the keywords or phrases that the people use to find something, collecting these keywords and using them in future during webpage development which is helpful in getting good page rank and more visitors to our sites is called keyword research.

Keyword Stuffing: Preparing the Meta tags of web pages using keywords is called keyword stuffing.

Keyword Tool: A Keyword selecting tool, provided by Google ad words, for knowing the keyword popularity, keyword search volume, cost per click for a perticular keyword and also provides related keywords to it.