During the 2015-2016 season, the Senators ranked 9th in the NHL in goals per game. It’s an impressive ranking, but made even more noteworthy when considering they were just 27th in the NHL in shots per game.
Quantity can often make up for quality in the sense that more attempts will increase the likelihood of success.
In the context of a hockey game, the more times a team shoots, the more goals they should end up having by the end of the season.
Theoretical probably dictates this, but reality isn’t always as smooth. Not all shots are created equal, and not all players have the same likelihood of scoring on any given shot as any other player.