The result page will be a table of data with your input IDs on the left and the matching orthologs (if any) from other species on the right.
Each result page will also have a plain text table link. This plain text data is easier to paste into a spreadsheet than the formatted HTML table.
Note that in cases of one-to-many orthology mappings, there can be more output rows than input rows, unless you check the "Match mode" checkbox.
The point of "match mode" is so that if you have a list of genes that you want annotation/orthologs for, you can just paste them in the input box and then copy the output data directly into your spreadsheet.
Gene annotation and orthology mappings are from Ensembl BioMart version 77, downloaded October 2014. Citation: BioMart: Driving a Paradigm Change in Biological Data management. Database (Oxford). 2011 Nov. 13;2011:BAR049. Print 2011. Pubmed PMID: 22083790;