You can specify a date range, the file name you wish to export as, the delimiter (marker) for each field and that indicates string values (non-numeric / text as opposed to numbers). You can optionally include the full order details field (text of the confirmation email to customer stored in the system) and incomplete orders (orders where the status checkbox 'complete' is not yet checked to indicate the order has been fully processed).

The file format is CSV - comma-separated values. This is a text format which spreadsheet programs such as MS Excel and Libre Office Calc can open. If you find data shows up in the spreadsheet with single quotes around values, try exporting again but select a double-quote as the 'string delimiter'.