After previewing and checking my web site on the internet, why is there letters running across of the top of the pages?

480D61B99BE9718ECEC548A4EC9A8721 googledfeddbfd256efe63.html -480D61B99BE9718ECEC548A4EC9A8721
Why is this running across the top of my web site pages?

This conversation is no longer open for comments or replies and is no longer visible to community members.