When Should I Leave the Jungle to Gank?

When should I leave a camp to gank a lane? I usually do a full clear before trying to gank adjacent lanes, or I clear three camps and then do a transitional mid gank. However, even when I gain an advantage, my lanes sometimes fall behind.

My question is: when is it worth leaving the jungle to gank before finishing everything? I’ve seen many players skip buffs to gank earlier, avoiding time spent on camps like the Rift Scuttler or Gromp. But should I sometimes skip those camps too, like Gromp or the Scuttler? And if I do, should I go back and clear them after the gank, leaving the jungle off-timer, or wait for the next respawn?

I’d really appreciate any advice on how to decide when to gank versus when to farm.