This is a OT question. I was going over new guidelines form google for
webmasters and read something which I am not sure what should I do for my
sites.
here is what they say:
Make sure your web server supports the If-Modified-Since HTTP header. This
feature allows your web server to tell Google whether your content has
changed since we last crawled your site. Supporting this feature saves you
bandwidth and overhead.
I am not sure how can I set that header any ideas about it.
If you want to read more details on it
http://www.google.com/webmasters/guidelines.html
Ketan Patel
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