Is a mod chip when you download a mod on a computer then add it to what if your game console?

Is a mod chip when you download a mod on a computer then add it to what if your game console?
No, its a chip that modifys whatever its put into. Many different types for game systems like the wii you can get a modchip to alow your wii to read dvds dvd-r ect. then with that you can also make game backups on dvd-r's or free games that were downloaded. Did i get off subject.