From my understanding, it's a dataviz of Facebook ads linked to politics.

For instance, if we select "Browse per country" and then "France", you can see political ads, with their political party, their content, their settings, etc.

I fumbled about in the Map tab for a while, not getting anywhere. But if you select your country and various parameters, using the 'Timeline' and 'Content' buttons gives you an idea of how targeted ads changed over time and what the content was. ... I think.

You can, for example, see ads that are targeted for one country e.g. US but are paid with different currency e.g. RUB.