When do the search engines consider the SEO Techniques as SPAM ?

The Search Engines considers the following Search Engine Optimization techniques as SPAM :

1. When your website is unnecessarily stuffed with keywords.
2. When you add hidden links or hidden text in your website.
3. When your website has automatically generated doorway webpages and cloaking and false redirects.
4. When the webpages of your website is loaded with irrelevant stuffs and words.
5. When you intentionally add duplicate content on multiple pages.
6. When your website illegally use the unrelated and centralized link farms.
7. When the website uses the misspellings of well-known web sites to attract more number of online visitors, pretending as the same well-known web sites.
8. Other tricks to deceive the search engines.

Above tricks are fairly used by Black Hat SEO groups to deceive the search engines and get the higher rankings in search engines.So pls avoid these kind of spam techniques!

Here are some related posts on Spam and Black hat SEO:

Combat Spam - Know how to do it!
Why Do Spammers Send Spam E-Mails?

Thanks!