The object of Yahoo! Sports Fantasy Football differs slightly depending upon the type of league you join.

Each week in a Head-to-Head League (all Public Leagues are Head-to-Head), your goal is to outscore another manager's team. Opposing managers each set a lineup based on the league requirements, and whoever ends up with the most fantasy points—based on league settings—wins the game. The weekly results are then tallied into an overall record.

In non-playoff leagues, the team with the best winning percentage wins the championship. In playoff leagues, the top teams have an elimination tournament to determine a winner.

In a Points League, the goal is to have your team earn more fantasy points than all of the other teams in the league. You set a weekly lineup based on league requirements and aim to have your players collect more fantasy points then anyone else's. Your points are tallied throughout the football season, and the team with the highest total at the end of the year wins the league championship.

Either way, the better your players perform in real-life games, the more points they earn for your team.