Both work results, such as requirements, use cases or documents as well as the relationships between these elements are saved in a central database so that it’s no problem to record 10, 100 or 1000 requirements.
You can determine who creates, edits or deletes requirements. There’s an integrated rights concept for this.
If you create requirements in a MS Excel or MS Word file, then you can import them into the tool with a few clicks. There are also import and export assistants for ReqIF files and JIRA issues.