The Eastern Conference of the National Basketball Association currently contains fifteen teams divided evenly between three divisions: the Atlantic Division, the Central Division, and the Southeast Division. The Eastern Conference teams generally play each other more than twice a year, with even more games played within divisions. Eastern Conference teams only play teams from the Western Conference twice, once at home and once away.
In recent times, the Eastern Conference have generally contained weaker teams than the Western Conference, often having teams making the playoffs with sub-.500 records. That isn’t to say that the top teams in the East can’t play with the top teams in the West, because the Detroit Pistons and the Chicago Bulls have both won multiple championships in the time span that the West has dominated.
The play of teams in the Eastern Conference is often different than that of the Western Conference as well, mainly because the size of players on teams in the West is generally larger. Eastern Conference teams also generally rely more on defense, and have lower scoring games.
Not that it has much to do with anything, but the Eastern Conference generally fairs well in the NBA All-Star Game even through the years of Western Conference dominance in the regular season and post-season.