If Modified Since

If Modified Since tells search engine spiders one of two things about a webpage:

• This webpage has not changed, no need to download again.
• This webpage has changed so download again because there is new information.

If the requested page has not been modified since the time specified by a search engine spider, a 304 (not modified) response will be returned without any message-body.

If you have any issues using If Modified Since, find a bug or have an idea to make the plugin even better then please help to improve If Modified Since.
If you don’t report it, I can’t fix it!