In its most commonly used form in NFL betting, “public” generally describes either a single bet or a style of betting that is most commonly used by non-professional bettors.
“Public” betting is seen as a point of contrast with “sharp” betting, which is often a more complex strategy used by advantage bettors and professionals.
As a general rule, “public” NFL bets will have a majority of the tickets because there are far more public bettors than sharp bettors. It's in the nature of NFL betting that “public” is often interchangeable with “popular.”
However, one misconception in handicapping is that a highly public side is automatically the wrong one. While it's true that public bettors are sometimes associated with losing bets, that's over the course of dozens (or even hundreds) of bets. It's impossible to draw serious statistical conclusions about individual wagers. Even bad bettors often win bets.'