Bluebird is a lucrative sales opportunity that you come across unexpectedly, without much effort.
The term is often used by sales professionals when talking about inbound leads. As 80% of the buyer’s journey happens without you knowing, those might indeed seem like they come out of the blue.
Yet, that is not quite true as it takes a certain amount of effort – although often indirect – to build awareness. So getting an actual "bluebird" is a very rare case in sales.