I like the idea of making one post (or ad creative) on facebook page, and then focus my campaigns on the same post, rather than creating a new ad creative for every campaign. Question to experienced advertisers - how does it impact the delivery of my content? For eg there is post which I am promoting to different audience sets in different countries - what would be the impact in delivery of impressions & ultimate cost? What is the strategy that people generally follow? Should I make a new post (dark?) for every country or audience I want to the run the campaign for?