If you frequently deal with electronic forms that require a signature, you may find it tedious to print, sign and scan documents.
From a legal perspective, your signature validates a document, binding you to the document's contents. The same laws that apply to conventional signatures apply to digital signatures. With the widespread use of email and electronic files, chances are you will need to add your digital signature to a document, such as a PDF, at some point. You can add your signature in PDF files electronically without having to physically sign the document.