Use this field to provide an engaging description that highlights the features and functionality of your app.
Users read your store listing to learn about your app - and to decide whether to try it. Well-written descriptions that communicate valuable information provide a high-quality experience for users, both with your app and across the platform.
Each platform has its own limits for this field. It can span from 1300 (Roku) to 4000 characters (Google).
Don’t add unnecessary keywords to your description in an attempt to improve search results. Also, avoid including specific prices in your app description. Pricing is already shown on the product page, and references within the description may not be accurate in all regions.
Here are the guidelines for each platform:
If you want more tips on how to write a good app description, take a look at this other article: Writing Good App Descriptions