A family of Microsoft word processing software products for creating web, email, and print documents.
Office 2013 usually requires installation media and a product key for reinstallation.
If Office is associated with your Microsoft account, then installing on a new machine will become a little easier.
You may still need to activate by telephone; see https://support.microsoft.com/en-us/office/-telephone-activation-is-no-longer-supported-for-your-product-error-when-activating-office-9b016cd2-0811-4cb3-b896-5a6a13177713 .