Session properties are one way to annotate a session and can be used to segment and filter your data. The default limit for session properties is 10. In SDK versions; Android 5.14.2 and iOS 5.16.1 and above, up to 100 session properties are supported. To increase the number of session properties for your app, please reach out to support@embrace.io.
The difference between session properties and user personas is that the former are for items relating to the session or the device and not necessarily to the user. Different use cases for session properties might include light vs. dark mode, portrait vs. landscape, and also adding properties for different A/B tests your team may be running.
To implement session properties, please see more in our docs here: https://embrace.io/docs/react-native/features/identify-users/#session-properties