Sparklines are small, simple line graphs traditionally used for showing trends or variations of some variable.

Sparklines can be shown in the context of a graphical table or in a text area. The general idea of sparklines is that they can be included directly where they are needed to provide context to a value.

What you show in the sparkline (the X-axis and the Y-axis) is specified in the visualization properties (Sparkline Settings) for the visualization. See Adding dynamic items to a graphical table for more details.

Sparklines can be configured to be limited by markings, filtering, or expressions like any traditional visualization, or they can be locked to show fixed values using the settings in the Data properties for the Sparkline.