You have the option to either enforce your rights or share them
If you favor allowing others to reuse or republish your work without asking permission, you have the right to forgo your copyright protections.
You can register a Creative Commons license that announces your willingness to permit broad public use. us.creativecommons.org
Or you can include a statement spelling out the uses you want to permit.
Example: This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s).