diff --git a/mlir/docs/README.txt b/mlir/docs/README.txt
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+MLIR documentation
+==================
+
+Please note mlir.llvm.org is where MLIR's rendered documentation is displayed.
+The viewing experience on GitHub or elsewhere may not match those of the
+website. For any changes please verify instead that they work on the main
+website first.
+
+See https://github.com/llvm/mlir-www for the website generation information.