User blog comment:TsurugiFan16/MSPD 改: Inazuma Debaters!/@comment-5622730-20131004161441/@comment-4435241-20131004161701

Your debate is great~! Thanks for the great match~

STAB means that it has an element boost, like Shindou is wood and Fortissimo too, so Fortissimo receives an STAB because there share the same element~