When to use it
Use it when you can't or shouldn't attend a meeting. A clear decline frees the organizer to plan, and offering a written update means your input still counts. It's much better than accepting and not showing up.
Example
Organizer: “Can you join the planning session Thursday?”
You: “I can't make this one. Should I send a written update instead?”
Organizer: “Yes, please.”
In an email or Slack message
When declining the calendar invite, add a note: “Can't attend this one. I'll send my update on the data migration by Wednesday so you have it beforehand.”