@Michael_Soprano  refer below for details hope it help why Host is needed  https://experienceleague.adobe.com/en/docs/target/using/administer/hosts 

@Elanchezhiyan_E  are you able to install AA extention Event Forwarding Property tags , i believe not !! in terms of use case at high level Event Forwarding tag design to work with 3rd party platform, Data collections are tags for Adobe Ecosystem using WebSDK  Would like know to why or what is your ...

@Michael_Soprano seem to be mapped to be Send event Action however i think based on your use case can control it as need via event prior to action   

@TanishaNebhwani may be zero qualifications for your activity? change the qualifications criteria for the 3rd activity and check if it qualifies and impressions are captured 

@srinath1234  not clear , does your segment has Client ID and Client Secret , can you reiterate use case here ?

@KotiSyamala  approach is for image on the web channel, in terms for email channel, what i know AJO Email Tracking Experience Event Dataset would not give inputs for your use case,  as a workaround, embed created external web image map in your email, then try to hope that works 

@KotiSyamala  at high level - Add an HTML <map> element that defines clickable areas over an image. - capture event via WeBSDK> AEP event schema  -  configure custom event journey in AJO mapped to AEP event schema 

@ChanuteJo  agrees with all the suggestions here, but @GigiCotruta  , as mentioned, makes more sense in the long run and provides flexibility. However, data separation needs depend on your current and future use cases as well. Both ways are good decide based use case

@Michael_Soprano  Answer is b) Individual Profile , other does not allow partial ingestion a) Experience Event: Immutable does not allow  c) Ad hoc Schema : allow ingestion but full not partial 

@Michael_Soprano  do you mean visitor/customer  on already injected data ? can Define Consent Policies / Label  https://experienceleague.adobe.com/en/docs/experience-platform/data-governance/enforcement/overview    otherwise check below  https://experienceleague.adobe.com/en/docs/experience-platform...