Avoid Keywords in Google Play Store's "Full Description" Field
Recently I tried to update a Google Play Store listing that contained text something like this:
keywords: apple, celery, cherry, potato, oatmeal, juice, milk, peanut butter, beans
But the Google Play Store said this was a violation of their metadata policy. It took a while to figure this out, because those keywords had been in that store listing for more than a year without incurring a violation. In any case, the morale seems to be: avoid these kinds of word lists in the full description of your app.