What is the "_escaped_fragment_=" query parameter?

What is the Ajax crawling scheme specification?

What is the "escaped_fragment=" query parameter?

The _escaped_fragment_= parameter is a particular URL query parameter defined in the old Ajax crawling scheme specification. It allows HTTP servers to detect when a bot supporting the Ajax crawling scheme is requesting an HTML snapshot.

With the new Dynamic Rendering recommendation, this parameter is obsolete and not needed anymore.

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