Which feature of Google Docs allows multiple users to work simultaneously on a document?

The feature that enables multiple users to work simultaneously on a document in Google Docs is real-time collaboration. This functionality allows users to see each other's changes as they happen, which enhances teamwork and communication within the document. When collaborating in real time, contributors can edit text, insert comments, and make formatting changes, all while being able to observe modifications made by others instantly. This level of interaction is particularly valuable for projects requiring input from various stakeholders, as it eliminates delays and the need for version control often associated with traditional document editing methods.

The other options, while important features of Google Docs, do not specifically address the simultaneous editing capabilities. Document sharing allows users to grant access to a document but doesn't inherently provide the real-time editing experience. Cloud storage refers to the capability of storing and accessing documents online safely, and template usage relates to starting new documents from predefined formats. Neither cloud storage nor template usage directly enables collaborative editing among multiple users at the same time, which is the key aspect of real-time collaboration.