FBS football stands for Football Bowl Subdivision, which is the highest level of college football in the United States. FBS consists of the largest schools in the National Collegiate Athletic Association (NCAA), and as of the 2023 season, there are 10 conferences and 133 schools in FBS. FBS players make up the vast majority of the players picked in the NFL Draft. FBS is further divided into two sub-divisions: the Bowl Subdivision, abbreviated as the FBS, and the Championship Subdivision, abbreviated as the FCS.

The main differences between FBS and FCS football are the number of scholarships offered, the size of the schools, and the postseason format. FBS schools can offer up to 85 scholarships, while FCS schools are limited to 63. FBS schools are typically much larger than FCS schools, both in terms of student population and their athletics budget. FBS schools are able to offer additional scholarships and provide better facilities for their program. They also tend to have more experienced coaches and more competitive schedules. FBS teams must play in a bowl game if they are eligible, while FCS teams can only participate in their playoffs. FBS has a four-team College Football Playoff to determine the national champion, while FCS hosts a 24-team playoff for the NCAA Division I Football Championship.

In summary, FBS football is the highest level of college football in the United States, consisting of the largest schools in the NCAA. FBS is further divided into two sub-divisions: the Bowl Subdivision (FBS) and the Championship Subdivision (FCS). The main differences between FBS and FCS football are the number of scholarships offered, the size of the schools, and the postseason format.