Name a common format used for sharing documents digitally.

The Portable Document Format (PDF) is widely recognized as a common format for sharing documents digitally due to its ability to preserve the formatting, layout, and content of any document across different devices and operating systems. PDFs are designed to be easily viewed and printed, making them ideal for sharing important documents that need to maintain their original appearance, such as reports, presentations, and forms.

Moreover, PDFs can incorporate various elements such as text, images, hyperlinks, and even multimedia, allowing for a rich and interactive user experience. They also support security features, such as password protection and digital signatures, enhancing the usability and credibility of the documents being shared. This versatility and reliability have made PDFs a standard in both professional and personal communication when sharing documents.

In contrast, other formats like TXT, DOC, and PNG serve different purposes. While TXT files are plain text and do not support advanced formatting, DOC files, specific to Microsoft Word, may not be universally accessible without appropriate software. PNG, being an image file format, is primarily used for graphics rather than textual content. Therefore, the PDF format stands out as an optimal choice for digital document sharing, ensuring that recipients see the content exactly as intended regardless of their device or software.