I would like to have two separate environments: Dev and Prod. 1. I created separate workspace for Prod and Dev2. I would like to have separate at.js for Prod and Dev.Prod CMS -> Prod at.js Dev CMS -> Dev at.js How would you like to approach that?

How you manage different environments for Prod and Dev for personalization development? You create separate properties for Prod and Dev? Then how you map specific property with given at.js? Or in Target you just use test links?

The video on the bottom says:https://experienceleague.adobe.com/en/docs/journey-optimizer/using/audiences-profiles-identities/audiences/create/custom-uploadIs it up to date? 

How you configure web channel in AJO when it comes to different type of pages?My first idea is to create separate configuration for:- home - basket - confirmation - product page (all in one configuration) What are your best practices? 

When I add Test Profile to the Seed lists that this mean that profile attributes for the sendout would be taken from that Test Profile and send to Seed List mailing? Or is it only just technical thing?  

Item Catalog - what is it about? It is like product feed? I totally get Offer Collections and Decisions. https://experienceleague.adobe.com/en/docs/journey-optimizer/using/decisioning/experience-decisioning/decision-items/catalogsCould you explain me the real use-case for that 3 items? 

Does this mean that the user is in both journeys - Journey A and B? 

Does this mean that I should create exclusive dataset only for updated data?Than dataset should then have all the fields which might be updated? Do you have any best practices regarding that? 

So its ALWAYS send by default with page view event or with any other decision scope?

Is that event send by default if the campaign was rendered? Or is it connected with send event complete?In which field / dataset that data would be stored? Do I need to add something additionally?