Why do UEFA coefficients exist?
They exist to decide which teams play in the European football cup competitions, and how they will be seeded. It is obvious that all the clubs in Europe cannot participate in an all-play-all league. It is also obvious that some countries are stronger than others. The co-efficient system is a means of trying to decide, as fairly as possible in UEFA’s judgment, who should play in the European club competitions. The principles are that a stronger country will be allowed more places than a weaker country, and its teams may start at a later stage of the competition, and a stronger team is seeded in a higher position than a weaker team. Both in principle and in degree UEFA’s gradations are much debated.