Libs - it is common functionality. You can use it for any your tasks.
For example Bots.Business have such Libs:
Random Lib - for random messages from bot
Referral Lib - for referral tracking
ResourcesLib - for chat resources with growth and etc
Lang Lib - for multi language
1.Go to Libs Tab in the App
2. Click on Install button
3. Select your bot
Please see help article for this Lib.
All public official BB libs avaible in https://github.com/bots-business/store-libs