2  Each of the major search engines provide   specific guidelines describing what webmasters should and should not do to their web pages in order to achieve a better search engine ranking,thoughthathas not always been the case.

METHODS OF SPAMMING

1. hidden text
2. mirror pages

What is "hidden text?"

1. Hidden text is textual content which your visitors cannot see, but which is still readable by the search engines.
2. The idea is to load a Web page with keywords and keyword phrases that would be unsightly to visitors but that would improve the page's rankings in the search engine results, and to do so without letting your visitors see the text.

1. Hidden text is identified as search spam by each of the major search engines.
2. Using any of these techniques can result in your site being permanently banned from the major search engines

DOORWAY PAGES

1. Some tools automatically create "optimized" web pages for you. These pages are called "doorway pages" or "advertising pages".

They are supposed to look good to search engines but they are ugly and meaningless to human web surfers. Search engines don't like that kind of automatically created pages and they consider this spam.
MIRROR PAGES

1. They are exact copy of primary pages but on different  domain…
2. just like some one copies best content from your site and get it published on his own website without your permission....
3. sooner or later these kind of pages got detected...and got penalty under duplicate content by search engines.

BLACK HAT SEO

1. Some search engine optimization companies and software tools use unethical techniques and tricks to artificially boost the search engine rankings of a website. These methods are called black-hat SEO.
2. You might get short term results with these techniques but it is very likely that your site will be banned from search engines if you use them.

BENEFITS OF WHITE-HAT TO

1. Search engines:  they are provided with pages that are easy to understand and that contain the quality information that their visitors search for.
2. Searchers: They win as they are getting what they ask for from the search engines.
3.  Web site owners: They win as they are getting quality visitors who are interested in what their website has to offer.

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