The Website view shows parity based on actual searches made on your booking engine. It's weighted by how often guests search specific dates and room types on your site.
The GHA view shows parity based on a fixed set of itineraries (2 adults, 1 -7 nights over 90 days) from Google Hotel Ads. It's not tied to real booking engine searches, but instead gives a broad, consistent view of your competitiveness on Metasearch.
In short:
Website parity = what your guests searched for
GHA parity = a full-market snapshot across common stay patterns
This helps you compare performance across two different channels.