Personalization is a powerful feature that stream provides as it enables you to leverage machine learning to optimize what's shown in a user's feed, giving it a more "relatable-feel".
It should be noted that STREAM's PERSONALISATION FEATURE is really aimed at established companies with an existing user base. It doesn't really work unless you already have a large DB of data you have collected on your users that the model can use.
Famous examples of such feeds are TikTok's "for you" screen, Instagram's explore section, and Pinterest's main feed. Edge rank is used by Facebook and LinkedIn
So if you are just starting to build your app or social network, it is best to continue with your existing Feeds integration and build up your user base with simpler tools.
If interested in having this enabled. Please contact email@example.com and you will be guided properly.