Dropbox is a cloud storage platform that offers sophisticated tools beyond its simplicity, including file previews, commenting features, selective sync for local space, and remote deletion of files on stolen devices. It also allows users to backup entire desktop and documents folders, access previous versions of files, view screenshots quickly, add comments to files, and customize notifications. Additionally, Dropbox has a favorites feature in its mobile apps that enables offline access to certain files, and it can be integrated with other tools like Zapier for automation and customization.