Definition
Monthly Active Subscribers (MAS) are the number of unique subscribers who engage with your newsletter content during a selected time period. This metric highlights how many people are actively interacting with your emails, offering a clearer picture of audience health than list size alone.
Purpose
Tracking MAS helps you:
- Understand trends in subscriber activity and retention.
- Measure newsletter growth over time.
- Identify patterns of engagement across different time periods.
This metric works like a “fitness score” for your audience: steady or increasing MAS indicates strong, consistent engagement, while declines may point to issues in content, cadence, or deliverability.
Reporting Options
The graphs in this report allow you to choose how data is grouped:
- Daily – view changes on a day-to-day basis.
- Weekly – see broader weekly trends.
- Monthly – track long-term growth and retention.
Changing the grouping interval updates both graphs and the summary table.
Graphs in the Report
Active Subscribers Over Time
- Displays the total number of active subscribers for each selected period.
- Use grouping options to zoom in on daily fluctuations or step back for longer trends.
Average Interactions per Active Subscriber
- Shows the average number of interactions (opens, clicks) per active subscriber.
- Helps gauge the depth of engagement within your active audience.
Data Table
The summary table combines both datapoints into a single view:
|
Date |
Active Subscribers |
Total Engagements |
Avg Engagement/Subscriber |
|
Aug 5, 2025 |
1,434 |
8,453 |
5.89 |
- Active Subscribers – number of unique subscribers who engaged during the time period.
- Total Engagements – total number of interactions (opens, clicks).
- Avg Engagement/Subscriber – the average interactions per active subscriber, showing engagement depth.
Export Options
The complete report can be exported as PDF or Excel, making it easy to share with your team or track results over time.