Once you've extracted the ZIP file, open Lightroom, head into the Develop tab. Right click on an existing preset folder (For example User presets) and choose 'Import'. Pick the presets form your download.
These were exported from the latest version of Lightroom CC, but they should work in all recent versions of Lightroom.
Please don't distribute theses presets from your own site. Feel free to link to here though!
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