Linked from
The 16 pages that link to Sodium hypochlorite, each with the reason it gives.
HypochloriteBroader topic: It is the most widely encountered hypochlorite salt.
BleachBroader topic: It is the principal active ingredient in chlorine-based household bleach.
BleachingRelated: Its strong oxidation can whiten textiles but also weaken some fibers.
Haloform reactionBroader topic: Bleach supplies chlorine and base for a practical haloform reaction.