A "casual viewer" refers to someone who watches or engages with something, such as a TV show or sport, without much interest or deep involvement. They typically do not follow the subject closely or invest much time or effort into it. Full definition
That's frustrating for casual viewers, and it's a problem hockey has never quite overcome. (sportstarsmag.com)
Even casual viewers of classic film are generally familiar with this, whether or not they have seen it. (awardscircuit.com)
But if you consider yourself a more casual viewer, then we suggest you put that chunk of change you've saved up on the new M - Series. (digitaltrends.com)