They are tracking what search terms people are using to search from Google. These search terms have been grouped under few headings, like "voter intimidation".

They are tracking what search terms people are using to search from Google. These search terms have been grouped under few headings, like "voter intimidation". Looks like they are not telling what search terms are actually used. Maybe this is to prevent people from gaming the system. "[...] To ensure the map includes the most relevant trends, we compiled a list of ways English and Spanish-speaking voters might indicate voting issues through their search queries on Election Day, by looking at historical data from 2012 Election, Super Tuesday 2016, and early voting 2016. We combined hundreds of the most relevant search terms around the following voting issues [...]" https://medium.com/google-news-lab/how-google-trends-data-will-fuel-electionland-tomorrow-6c465814179c#.cc39d1d80 https://medium.com/google-news-lab/how-google-trends-data-wi...