The Dashboard (Marketing > Email > Dashboard) gives an overview of all your email activity:

• Three KPI cards: Total Sent (emails delivered to the provider), Avg. Open Rate and Avg. Click Rate across all campaigns and flows. Under each rate a small line reads e.g. 120 opened · 310 opens total – the rate counts each recipient once, while the second number is the raw number of open/click events (hover to see the average per person).
• Three quick-link cards: Create a Campaign, Create a Flow and Create a List.
• A campaigns table with tabs Scheduled, Sent, Outbox and Error, with the same columns as the Campaigns page (ID, date, Name, Type, Total Recipients, Opened, Clicked, Errors depending on the tab). Click the ID or the pencil icon to open a campaign.

A + New Campaign button in the header starts the campaign wizard.