The .ova file extension is attached to files that contain descriptions of a virtual machine. .ova files are usually package files and they contain the descriptions, certification information as well as other information regarding the virtual machine. These files consist of a variety of files in one archive which is why they are also called Open Virtual Applications. They are data files because they are not used to execute the virtual machine. They merely contain information about the virtual machine.
If you want to convert Virtual machine to physical Machine you can refer the below links.