The author, a freelance tech writer, discusses the importance of using an electronic signature app to sign documents online. They tested almost 40 eSignature apps and narrowed it down to six best options for small and medium-sized businesses. The author notes that while definitions matter, electronic signatures are just computer-added signatures, whereas digital signatures use cryptography to protect documents and embed details like email addresses and device serial numbers. They recommend using a dedicated eSign app to ensure security and legal recognition, and provide recommendations for apps such as Docusign, Preview, Adobe Acrobat Reader, eSignatures.io, SignWell, and SignNow, each with their own strengths and features.