When you publish the journey live, from that point onwards - whatever profiles qualify into the streaming segment should enter the journey provided they meet the audience criteria.Any profile previously qualified into the audience before the journey was live would not enter the unitary journeys.Ther...

Here is an example defined in this experience league page too https://experienceleague.adobe.com/en/docs/journey-optimizer/using/content-management/fragments/customizable-fragments#example 

The step of updating back the user's consent to 'y' via landing page needs to be done manually before the email sending activity. Ensure the profile is marked as a test profile by setting testProfile attribute to true.Then open the landing page with the profile that was marked as test profile via Si...

You can use the following config. in condition node https://experienceleague.adobe.com/en/docs/journey-optimizer/using/orchestrate-journeys/about-journey-building/condition-activity#time_condition

You can try it on the following lines {% let d = now %} {% let dayOfWeek = dayOfWeek(d) %} {%#if dayOfWeek = 3%} "Wednesday" {%else%} "Something else" {%/if%}

You can validate it on the following lines {% let d = toDateTimeOnly(currentTimeInMillis()+7*1000*60*60*24) %} {% let x = formatDate(d, "yyyy-MM-ddTHH:MM:SSZ") %} {% let y = concat("https://i.countdownmail.com/3iru0d.gif?end_date_time=",x) %} <img src={{y}} border="0" alt="countdownmail.com"/>

You can use one of the events to start the journey, wait for x minutes / hours before the other event arrives and then access the relevant attributes from the second event using collection management functions https://experienceleague.adobe.com/en/docs/journey-optimizer/using/orchestrate-journeys/bu...

You can leverage fields of OOTB schemas and populate the corresponding datasets with test data to validate the helper functions that you are interested in by previewing the content (ensuring the profile you are using is marked as a test profile). Referenceshttps://experienceleague.adobe.com/en/docs/...

You can take a look at this thread https://experienceleaguecommunities.adobe.com/t5/journey-optimizer-questions/how-to-determine-which-field-to-show-from-an-array/m-p/688246#M2326 

You won't be able to update the val attribute from update profile node.