Google shows Android app developers what not to do with their listings in the Play Store
The changes being made to app metadata will limit the title of an app listed in the Play Store to 30 characters. Google also does not want graphic images and texts to promote an app’s ranking in the Play Store. For example, an icon that says “#1 stock market app” is a no-no. Text and graphic elements can not be used to promote a deal, and capitalized letters are out unless it is part of how a company stylizes its name.
There are also new preview asset guidelines for feature graphics, screenshots, videos, and short descriptions. Google says it wants to know whether the preview assets accurately represent the app or game, and whether they deliver enough information to help users reach a decision about installing the app. The preview assets cannot use buzzwords like “free” or “best,” and must focus on “providing meaningful information” about the things that make your app or game unique.
The guidelines will be valid starting in the second half of the year. Google says that “Assets that don’t meet our guidelines may be ineligible for promotion and recommendation on major Google Play surfaces like Apps and Games home.”