Can't find app on Google Play but can see it from URL

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http://stackoverflow.com – I published an app yesterday and see it when I type https://play.google.com/store/apps/details?id=packagename into my browser. It's clearly on the play store, yet I cannot find it when I search the store from my phone or my computer. I was able to download it onto my phone using the URL above. Is there a setting I'm not selecting or something that would be causing this? (HowTos)