Digitally signing a Word document is the act of confirming the contents of the document with your signature and certifying it as authentic. This is usually done electronically, using digital certificates that are applied to the document as an extra layer of security. When a Word document is digitally signed, it can be trusted by those who receive it, as it is now legally binding for the signer and recipient. By digitally signing documents, you can save time and money while streamlining processes and workflow.