Order By determines the sort order in which search results are listed.
By default, Order By is set to Relevance.
Relevance: Items are sorted by how relevant the result is to the keywords entered in the search.
Added Most Recently: Items are sorted according to when they were added to AMP. The newest addition is listed first.
Earliest Items (Lowest Item ID): Items are sorted according to when they were added to AMP. The oldest addition is listed first.
Title A-Z: Items are sorted in alphabetical order. Note that numbers and quotation marks take priority over letters and will be listed first.
Title Z-A: Items are sorted in reverse alphabetical order. Note that numbers and quotation marks take priority over letters and will be listed last.