difference between Google panda and penguin | Keyword Stuffing | Doorway pages

What is the difference between Google panda and penguin? | Keyword Stuffing | Doorway pages

S. N.	Penguin(Hates)	Panda(Hates)
1.	Low Quality link	Thin Content
2.	Over Optimized Anchor	Content Farms
3.	Keyword Stuffing	High bounce Rate

Keyword Stuffing: - Keyword stuffing is the practice of inserting a large number of keywords into Web content and Meta tags to increase a webpage's ranking in SERP and get more traffic to the site.

How is it done?

        a)     Coloring text or link

        b)    Hiding text or link

        c)     Using “Noscript" tags

Some other Examples of keyword stuffing include:

• Lists of phone numbers without substantial added value
• Blocks of text listing cities and states a webpage is trying to rank for
• Repeating the same words or phrases so often that it sounds unnatural, for example:

Doorway pages: - are often easy to identify in that they have been designed primarily for search engines, not for human beings. Sometimes a doorway page is copied from another high-ranking page, but this is likely to cause the search engine to detect the page as a duplicate and exclude it from the search engine listings. Having multiple domain names targeted at specific regions called Doorway pages.

Cloaking - Another form of doorway pages are using a method called Cloaking. They show a version of that page to the visitor, but different from the one provided to crawlers, using server side scripts.

Keyword Density: - Keyword density is the percentage of times a keyword or phrase appears on a web page compared to the total number of words on the page.

Content farm- A content farm, also called a content mill, is a Web site whose content is written for search engine bots instead of human readers. Topics on a content farm are chosen specifically for their ability to rank highly in search engine results. A content farm generates revenue by placing ads on the page or selling contextual hyperlinks within the content. The more Internet traffic a page gets the more revenue the page can generate.

 

Content spinner- A content spinner is software that rewrites content to make it reusable as new content.