Specs to be developed with DR, but the general idea is this would simplify the existing contribution search, showing only the relevant fields. It would also provide an autocomplete option for the currency search (which would actually search the source field to match currency ISO code).

One key use would be finding donations when a donor asks "why is there a charge on my card?" but the donation does not appear under their name or email in CiviCRM.

See Alternative Search Method - Contribution Search in DR's Civi Guide.