The ads in question were memes, manufactured and posted to a number of bluntly named, pseudo-American Facebook accounts in 2016 by workers at a troll farm in St Petersburg, Russia. There were thousands of these ads, it seems, plus parallel efforts on Instagram and Twitter. Between them, they reached over 100 million people.
The ads were clumsily written. They were rife with spelling errors and poor grammar. Their grasp of American history was awful.