I'm building for cdr so I can spam my Q attack.
|ADC||Attack damage carry|
|ARAM||All random all mid|
|Diving||Venturing far into enemy territory|
In League of Legends (LoL), items and abilities that grant cdr reduce a champion, item, or spell's cooldowns (cd). This allows you to use the affected abilities more frequently.
For example, Luden's Echo grants 10% cdr, meaning a champion can reuse their ult and other abilities 10% more quickly. You may also see cdr referred to as ability haste, because Riot renamed the cooldown reduction stat to ability haste in LoL version 10.23.