I recently added a new field to the Benefactor Page section in Civi called
Benefactor Level - with a dropdown option to select the level a donor is listed as on the Benefactor page, as follows:
Major Benefactor ($50k+)
Patron Donors ($15k-49,999)
Leading Donors ($5k-$14,999)
Sustaining Donor ($1k-$4,999)
Is this field able to be searchable in Advance search also?