What is vocation?

So our job is to "help integrate vocation awareness"? I think I'm still getting my head round what that means. I think I prefer "foster a culture of vocation" which feels a bit more manageable to me - something about helping people to recognise how they are or even that they are called by God. I think we have to start here before leaping into specific vocation territory! BUT. I'm really interested in the relationship between 'what I do' and vocation - like Therese of Lisieux whose vocation was 'love' compared to somebody who would say their vocation was 'to be' a priest or be married.