Most social apps have some form of content within the app. I like to think of these as content blocks that can change or adapt to the need (device, app, website, etc.). That way you can have one style that users are familiar with and use it in all sorts of ways while maintaining consistency and building brand awareness. This was a content block for 21 Days of Happiness course. I like to use text areas to type about font, size, color, etc. and give more context to the dev team because I find this is a very effective way to do it.