This is my approach to DVS second challenge. I like using interactive plots to explore data, so here they are! The first plot shows trends of number of messages by channels using ridgeline plot. Tooltips show all available information. At the bottom of the plot you can find a date selection plot.

In the second plot I have decided to explore engagement. In the left part you can see a scatterplot showing the number of reactions and messages length of varios channels. The plot is zoomable. Clicking a circle with a channel (multiple selection with "shift" is possible) will show trends of reaction to message ratio on the plot to the right.

In the last plot I want to explore most active channels by diccussions. On the left plot you can see channels sorted my mean message length. Clicking a channel bar will show trends of number of messages in the plot on the left.