In Excel consulting services, improving collaboration in shared workbooks involves using cloud-based solutions like Excel Online or OneDrive, where multiple users can access and edit the file simultaneously. Consultants recommend enabling track changes and comments for better communication among team members. Locking certain cells or ranges ensures that critical formulas and data are protected. Version control is also essential, allowing users to revert to previous versions if errors are introduced. Proper user permissions and clear guidelines on editing responsibilities help streamline collaboration and maintain data integrity in shared workbooks.