Matt Cutts of Google has written two posts on the topic of SEO:
The first post “undetectable webspam” shows how "undetectable" cloaking and web spam could be found with a single Google query.
That’s right, someone hasn’t configured their “undetectable” cloaking script correctly. The errors that the script is spewing out give absolute file paths and much more info. Digging into the details mentioned in the error messages quickly leads you to more domains. So much for that cloaking being undetectable. By the way, this cloaking script has been producing highly noticeable errors like this for almost two months.
So here’s a few takeaways:
- If you’re going to claim that your webspam is “undetectable” then try to avoid spewing error messages that give lots of information about your domains.
- Also, you might want to avoid internal names like “CLOAKING_LINK_BUILDING” or “CLOAKING_RSS_Reader.php”. It tends to be a bit of a giveaway, and you never know when those names will get accidentally exposed.
More generally, if someone is trying to manipulate Google by deceptive cloaking, it means that a webserver is returning different content to Googlebot than to users. That’s a condition that can be checked for by algorithms or manually, and such cloaking is certainly not “undetectable.” For cloaking to be completely “undetectable,” it would have to be like that Steven Wright joke: “Last night somebody broke into my apartment and replaced everything with exact duplicates.” And a cloaking script that gave users and Googlebot exactly duplicate pages would be a bit pointless.
In his second post “The anatomy of a search result”, Matt talks about the anatomy of a search result, and gives some useful tips on how you can help improve how your site appears in our results pages. This talk covers everything you'll see in a search result, including page title, page description, and sitelinks, and explains those other elements that can appear, such as stock quotes, cached pages links, and more.
Source:→ SEL Blog