Introduced in 1979, coefficients are statistics used for ranking and seeding clubs depending on how well they've done in UEFA competition.
Clubs receive points depending on whether they win or lose matches in Europe, with the clubs who are regularly successful in the Champions League and Europa League accumulating more coefficient than those who are not. For example, a club earns 40,000 coefficient points if it wins a qualification match – but 78,000 if it wins a final.
Bayern are the top-rated side with 138,000 coefficient in this season's competition.