Looking for Technical Signals
When evaluating a page for spam, you should start by looking for the following "technical signals."
• Hidden text and hidden links.
• Keyword stuffing.
• Sneaky redirects.
• Cloaking with JavaScript redirects and 100% frames.
This section describes these technical signals and provides tips and tools on how to identify them.
Hidden Text and Hidden Links
Apply Ctrl-A to the Landing Page
Example of hidden text revealed by applying Ctrl-A:
Look Outside the Normal Viewing Area
Advanced Techniques
Example of hidden text revealed by disabling CSS:
Example of hidden text revealed by disabling JavaScript:
Example of hidden text revealed by viewing the source code:
Example of keyword stuffing that appears in the meta tags only and is not considered to be spam:
Keyword Stuffing
Recognizing keyword stuffing
Keyword Stuffing in the URL
Keyword Stuffing in the URL Example
Sneaky Redirects
Recognizing sneaky redirects
Using "Who Is"
Sneaky Redirect Example
Non-Sneaky Redirect Example
Cloaking
% Frame Example
Apply Ctrl-A to the Landing Page
Example of hidden text revealed by applying Ctrl-A:
Look Outside the Normal Viewing Area
Advanced Techniques
Example of hidden text revealed by disabling CSS:
Example of hidden text revealed by disabling JavaScript:
Example of hidden text revealed by viewing the source code:
Example of keyword stuffing that appears in the meta tags only and is not considered to be spam:
Keyword Stuffing
Recognizing keyword stuffing
Keyword Stuffing in the URL
Keyword Stuffing in the URL Example
Sneaky Redirects
Recognizing sneaky redirects
Using "Who Is"
Sneaky Redirect Example
Non-Sneaky Redirect Example
Cloaking
% Frame Example
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