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Natural Link
A natural link is one that occurs organically (not easily seen as being placed by your company).
Natural links don’t:
- Have tracking parameters.
- Exist within sponsored or paid content.
- Redirect through JavaScripts or monetization tools.
A natural link exists as a reference to a piece of content, website, or source.
Negative SEO
refers to the practice of using black hat and unethical techniques to sabotage a competitor's rankings in search engines.
Niche
An SEO niche is a part of the market you want to build and promote your website in. Choosing a certain niche you narrow your audience, but you increase its interest in your website. Before starting your website, you have to be sure that your niche has an audience and they will be willing to visit your site.
Noarchive Tag
A special tag that tells Google not to store a cached copy of your page.
Nofollow Attribute
Is a value that can be assigned to the rel attribute of an HTML an element to instruct some search engines that the hyperlink should not influence the ranking of the link's target in the search engine's index. The nofollow attribute looks like this:
<a href=”http://www.example.com/” rel=”nofollow”>Anchor text goes here</a>
Noindex Tag
The noindex directive is an often used value in a meta tag that can be added to the HTML source code of a webpage to suggest to search engines (most notably Google) to not include that particular page in its list of search results.
By default, a webpage is set to “index.” You should add a <meta name="robots" content="noindex" /> directive to a webpage in the <head> section of the HTML if you do not want search engines to crawl a given page and include it in the SERPs (Search Engine Results Pages).
Nosnippet Tag
Tag that tells Google not to show a snippet (description) under your Google listing, it will also not show a cached link in the search results
Noopener
Basically instructs browser not to send referer information along with header. Technically, it just nullify the object "window.opener". It they're tries to be secured by not allowing their details on header to the following link.
Noreferrer
Specifies that the browser should not send a HTTP referrer header if the user follows the hyperlink. A Noopener instructs the browser not to send referer information along with header.