Noun
a press conference or interview in which a government official explains to reporters the background of an action or policy
Source: WordNetthe secretary gave us a backgrounder on public health issues Source: Internet
In 2013 he offered a two-part backgrounder on why things had gone so tragically wrong in Syria, with a heavy emphasis on ramifications of the years-long drought. Source: Internet
*If you somehow missed the news about a young man named Corey Patrick, here's a quickie backgrounder. Source: Internet