Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
A map is a spatial detail which is composed of one or many layers. A layer is the way in which ESRI Maps for Strategy visually represents geographic datasets. A layer is similar to a legend item on a paper map. For example, on a road map, roads, national parks, political boundaries, and rivers might be considered different layers. When you add Strategy business data to a map, Esri Maps for Strategy creates a layer and displays it on the Contents pane. Once the layer is created, you can configure how it is styled, set its transparency, enable clustering or heat maps, turn on pop-up windows, and so on.
You can add a Map visualization to your dossier, to display your data as map markers on an interactive map. You can use the visualization to:
In the image below, you can view different layers used to compare different attributes and metrics on the map.

In the image below, you can view clusters on various data points on the map.

Requirements:
Minimum Strategy version: 10.9
Publisher: Strategy
Installation Instructions:
Analyze using maps by downloading MicroStrategy Desktop!
References:
Esri Maps of Strategy, Esri. Retrieved from https://doc.arcgis.com/en/maps-for-microstrategy/1.0.1/design-and-use-map/add-microstrategy-data-to-your-map.htm