You can create assignments in content areas, learning modules, and folders. Since assignments require a grade value, they automatically generate a column in the Blackboard grade center. Submissions are collected electronically. Some file formats (Word, PowerPoint, Excel, PDF) will render within Blackboard for inline grading.
For more information about Blackboard assignments, visit Blackboard Help: https://help.blackboard.com/Learn/Instructor/Original/Assignments