Item Filtering is optional. To filter the items from the data source so that only certain items are displayed in the Web Part, define a filter criteria.
Configure Item Filtering
Show the item when column: Select the column or field to filter by, select the comparison operator (i.e. Equal To, Contains, etc.), and then enter the value to filter on.
Show More Columns…: Click this link to filter by more than one value using AND/OR logic.