Announcements import into Canvas and are set to Published status. All Canvas Announcements will be visible to students when you release the site unless you change the status of each one. Consider deleting Announcements that you will not reuse. Delay the posting of Announcements that you want to reuse.
For more information
- How do I edit an announcement in a course? https://community.canvaslms.com/docs/DOC-1808
- How do I delete an announcement in a course? https://community.canvaslms.com/docs/DOC-1810