In SoCast Engage, the 'Other' category may appear in the legend of the impressions pie chart but not as a visible segment in the chart itself. This happens when the percentage of impressions attributed to 'Other' is very low (for example, 0.2%). Most pie charts have a threshold for displaying small segments, so categories with very low percentages may not appear on the graph, even though they are listed in the legend. Categories with very low percentages may only appear in the legend and not as a visible segment in the chart itself.