Promotion is the moving from a lower to a higher league. Promotion is given when a team wins the league, finishes in a promotion position (often second place) or win a playoff competition Promotion is the opposite to Relegation
Promotion to a higher league can only occur when there is a higher league to be promoted to. A club in the English Coca Cola Championship can be promoted to the Premier League, because the Premier League is the next highest league up, but a team cannot be promoted from the Premier League as there is no English League above it. Of course, promotion comes with a price.The new league will have better teams in it and it is much more difficult for the new team to do well in the league.