Studio allows you to control the visual appearance of your features. This is called a style and there are different options between the basic primitives of Points,Lines and Polygons.
Points features are just at one single location on the map. This location can be highlighted by a Marker like a circle or square, an Icon image as well as a Label text coming from the feature properties. The text and icon can be shifted relative to the markers position to appear on top of or next to the marker.
Lines features connect two or more locations with a straight line. You can control color as well as the Cap style how the line ends and the the Join style which defines how two line segments connect to each other. You can place a Label on the line, which is drawn on each segment
Polygon features are lines closed up to describe an area. The area and the circumfence line can have different colors and the line thickness can be adjusted (also to zero, which means no lines is drawn). A Label text can optionally be drawn at the center of the polygon, or shifted from the center by an offset.
The order of the list of layers on your map also defines the order in which they will be drawn on top of each other. Think about a number of transparent sheets placed one on top of another on top of the underlying map. You can change this order by dragging layers up or down in this list.
The map can show interactive cards that allows viewers to see more of the data of a feature they select. The Cards list allows re-ordering of the properties, while all entries below the line will stay hidden. The first line becomes the title of the card.
Features can have more than one style, which means that you can change the look of a feature based on it's properties or have one feature drawn multiple times and get an overlay effect. This is probably one of the more powerful styling features as it enables your data to influence the look of the map.
When you select to Add a new style a selection dialog first asks you for the group of features this style should apply to. To narrow down the group from all features in your dataset you need to define one (or multiple) conditions on properties which features must meet to be considered part of the group.