title: Set field values in 1 place and apply those values on all other pages
body: <p>I am using ACF for an ad. There are 2 fields, an image for the ad and the link where the image will lead to if clicked on. I have set them up and they are working correctly. They are required to show on the home page, and on post pages. </p>
  
  <p>Now what this question is about: I would like to be able to set the ad only on the home page (or somewhere else if you have a better idea), and to apply those field values on the post pages.</p>
  
  <p>Currently I set it for the home page, its ok and it works. But if I create a new blog post, I need to select the ad for every new blog post. I believe this is bad UX, because if there is only 1 ad, it would be nicer to set it once and apply it everywhere else.</p>
  
  <p>What would be the best approach to implement this?</p>