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Official Google answers to common SEO questions

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Question:

Following your interview with Eric Engel - you mention about "If Modified-Since." We worked on many websites whereby the actual file timestamp doesn't change but the content does as the pages are database-driven. How should we deal with such situations.

Google's Matt Cutts answers:

Official Google Answer

Summary of the answer:

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Answered: 31 August 2010. Views: 686.

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