When to use it
Use it any time you need to check your understanding in a group: a number that doesn't add up, a term nobody defined, a plan with a step that seems to be missing. If you're confused, someone else in the room usually is too, so the question helps everyone.
Example
You: “Quick question, to make sure we're aligned: is the March date for the beta or the full launch?”
Manager: “Good catch. Beta. Full launch is April.”
In an email or Slack message
In a meeting chat or Slack thread, drop the apology entirely and lead with the question: “To make sure we're aligned: is March the beta or the full launch?” Short questions get fast answers.