I've attended Netroots Nation twice before. The first time was way back in 2007 in Chicago, back when it was actually called Yearly Kos (the conference started out as an offshoot of the Daily Kos progressive online community). They changed the name to "Netroots Nation" the following year to reflect that it had grown larger than any single website. The second time was here in Detroit in 2014, which happened to also be the same point I was at my peak media awareness (my "fifteen minutes of fame" so to speak).
For more than a decade, Netroots Nation has hosted the largest annual conference for progressives, drawing nearly 3,000 attendees from around the country and beyond. Netroots Nation 2019 is set for July 11-13 in Philadelphia.