A title like "Monthly Churn Rate" just repeats the axis label already printed on the chart — it never says whether the number is good news or bad news. A data slide's title should carry the conclusion even if no one looks at the chart at all.
The demo's ✕ sets the axis-label title "Monthly Churn Rate" over a plain line chart. The ✓ titles the same chart "Churn rate cut in half after the onboarding fix" and annotates the exact point where the drop happens.
Checklist: can you tell from the title alone whether the trend went up, down, or stayed flat, is the exact point where that happens marked with an arrow or label, are axes and legends that do not carry the conclusion visually quieted down.
When to use
For quarterly reports or experiment results, check that the title is not still just the axis label.