In Facebook’s Ad Library, Facebook reports spending on political advertisements by day, week, 30-day, and 90-day summaries, and total spending to date by Facebook Page and Disclaimer (for example, Page: Donald J. Trump, Disclaimer: TRUMP MAKE AMERICA GREAT AGAIN COMMITTEE).
Through long-term monitoring of the Facebook reports, we became aware that not every day’s numbers can be trusted the same. An analyst or a reporter who decides to use a daily download from Facebook may be in for an unpleasant surprise.