What feature allows teams to share files in Slack?

The file upload feature, accessed through the paperclip icon, is specifically designed to facilitate the sharing of files within Slack. This feature allows users to easily attach documents, images, and other types of files directly to messages in conversations, whether in direct messages or within channels. This streamlined process encourages effective collaboration by enabling team members to instantly share relevant resources without leaving the Slack environment.

While the drag-and-drop capability can also be a method for sharing files, it functions as an extension of the file upload feature rather than a standalone method. The link-sharing feature pertains more to sharing web links rather than uploading files, and the document collaboration tool typically refers to integrations with external applications. Therefore, the unique identification and straightforward usage of the file upload feature make it the most appropriate option in this context.