Often, when Draco gets a howler from Annabeth in fanfiction, it creates tension and conflict. It might expose something secret or force them to confront their feelings. Also, it could draw in other characters and complicate the story even more.
Perhaps another student, like Hermione, could send the Howler in a very creative twist in the fanfiction. Maybe she has found out that Draco is planning something malicious against the Gryffindors and uses the Howler as a way to threaten him into stopping.
Well, it depends on the context set by the fanfiction author. It might trigger a conflict or a new plotline. Maybe it reveals something unexpected about Annabeth or changes the dynamics between the characters.
Well, it could be that Draco did something to cross Annabeth in the fanfic's plot. Maybe he messed with one of her plans or said something disrespectful about her friends.
Well, in the fanfiction, Draco might be publicly shamed by the Howler. It could reveal some secrets he's been hiding, like his true feelings about his family's actions in the wizarding world. Maybe it scolds him for not living up to the pure - blood expectations.
It could be about Draco's performance at Hogwarts. Maybe Lucius is disappointed in Draco's grades or his behavior towards other pure - blood families' children.
There could be various plots. Maybe it leads to him changing his behavior or causes more conflicts within Slytherin. It might also draw attention from other houses and have consequences on the school dynamics.