Cloaking (Search Engine Optimization)

Search Engine Optimization has been one of my favorite field of interests.
From few months, I found that some websites are able to manage to appear at the top in the result-set from Google search, though the content was not up to the mark. Some times the content was really totally irrelevant or contained ads.

I tried to figure out the case with firing search from different browsers and by custom generated GET and POST messages. I was amazed as the content delivered by those sites were different in different cases. This meant that these sites are able to generate different content for search engine bots / spiders ( providing them some good contents) and when the same site is browsed by any user they show a different content mostly ads by detecting the request / user agent http header.

This technique is in use from 1 or 2 years but it has taken a sweep rise from few months back.
This technique is really deceiving the search engines.
read about it more here at Wiki.

I will share some URLs making use of this technique in days to come.
Till then happy surfing...!