Bind Arrows indicate where a Dark Bind Monster is bound to. Only the blue arrows around a Dark Bind Monster's artwork are Bind Arrows. The number of Bind Arrows a Dark Bind Monster has is equal to its Dark Bind Rating. Like Link Arrows, Bind Arrows point to Main Monster Zones where monsters from the Extra Deck can be Special Summoned.
Given the "corrupted nature" of Dark Bind Monsters, the opponent's monsters occupying the zones a Dark Bind Monster's Bind Arrows point to are given negative effects, similar to computer hacking or computer viruses.