Natural Language Processing

Algorithms which attempt to understand the true intent of a search query rather than just matching results to keywords.

Navigation bar (nav bar)

A navigation bar is a web site's navigation icons. These are usually arranged in a row down the left hand side or along the top of the page.

Niche

A topic or subject which a website is focused on.

Nofollow

Attribute used to prevent a link from passing link authority. Commonly used on sites with user generated content, like in blog comments.

Noframes tag

Noframes tag is an alternative non-framed HTML on a frameset page. These are very old non-frames capable web browsers and search engine spiders. If your site is framed, placing good keyword-rich text in noframes tags is good. But, a framed web site is not search engine friendly as long as it uses noframes tags.

noindex

A command found in either the HEAD section of a web page or within individual link code, which instructs robots to not index the page or the specific link. A form of link condom.

Natural Links

natural links are links gained as a result of quality content that other websites find useful. Natural links are valued high among major search engines.

Natural search results

The search engine results which are not sponsored, or paid for in any way.

Netscape

Originally a company that created a popular web browser by the same name, Netscape is now a social news site similar to Digg.com.

Naked Links

A posted and visible link in the text of a web page that directs to a web site.

Noembed Tag

The HTML noembed tag is used to handle browsers which do not support the embed tag. The noembed tag makes it easy to supply alternative content that tells users what they are missing.

No Script Tag

The noscript element is used to define an alternate content (text) if a script is NOT executed. This tag is used for browsers that recognizes the script tag, but does not support the script in it.

Negative Keywords

Filtered-out keywords to prevent ad serves on them in order to avoid irrelevant click-through charges on, for example, products that you do not sell, or to refine and narrow the targeting of your Ad Group's keywords. Microsoft adCenter calls them "excluded keywords." Formatting negative keywords varies by search engine; but they are usually designated with a minus sign.