@RenatoZu there is no default feature to see monthly active users or unique users for a month, but can try option below if it helps
- For web interaction pass to Adobe Ana, via another DataStream basically in case No Customer Journey Analytic is not available
- If Customer Journey Analytic available create data view to get required details
- an SQL query to get the count of unique/ active profiles with activity in the last 30 days:
- create segmentation for 30 days n segment membership