Unrelated. The Wikimedia Foundation has actually documented the wprov query parameter. It's used to track the source of a link; "sfti1" is "Share a Fact on iOS

Unrelated. The Wikimedia Foundation has actually documented the wprov query parameter. It's used to track the source of a link; "sfti1" is "Share a Fact on iOS for text shares, feature version 1". https://wikitech.wikimedia.org/wiki/Provenance https://wikitech.wikimedia.org/wiki/Provenance