A sparkline is a visual representation of a data series in only one cell, the image above shows sparklines next to each team's performance data. There are no visible axes and axes values, only a line that quickly highlights the trend, min and max values.
How to build
Click on a cell where you want the sparkline.
Go to tab "Insert" on the ribbon.
Click "Line Sparkline" button to open the "Create Sparklines" dialog box.
Select the cell range that contains the data.
Click OK button.
Click and hold with left mouse button on the dot shown in above image, then drag down as far as necessary to create sparklines for each data series.