Considering that baseball teams play a 162 game season (the longest schedule in sports), when a team crosses the 80 win plateau they essentially assure themselves of a successful season.
At the very least they have won half of their games and are guaranteed of finishing with a .500 winning percentage or better.
In their absolutely surprising 2018 season, the Boston Red Sox are 80-34 on August 7 after a win over another AL East rival the Toronto Blue Jays.
Most teams don’t reach this level until late August at the earliest and sometimes not until the September pennant runs.