Google: Robot.txt Blank Vs Allow Is No Difference

John Mueller from Google said in a Reddit thread that using a blank robots.txt file or just stating all is allowed in that file is the same thing, it doesn't matter which you use. He said "Doesn't matter" when he was asked Is there a difference? I've always used Dissallow: (blank) as it seems more efficient. But the current client is using Allow: /.

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