Email specific click reaction

@pietroam1 
To follow up a specific click in an Adobe Journey Optimizer (AJO) email journey, you generally need to track the unique "label" or "URL" of the link clicked by the recipient. Your approach is logical: a Reaction node captures the click, and a Condition node evaluates specifics about the click event. However, there are important limitations and a few constraints:

All Links Are Tracked by Default: If tracking is enabled for the email, every link can be monitored. Each link's label (the visible text or the tracking label you assign) is reported back and appears in the event payload 

Accessing Clicked Link Data:

• When a recipient clicks a link, the tracked label (or URL, depending on your setup) is recorded in the event payload (under timeSeriesEvents).
• Your journey condition should reference this collection and the correct field—for example:

  The label of the collection timeSeriesEvents at position 0 is equal to 'Voglio essere ricontattato'

Do not put logic or personalization expressions directly in the link URLs

Use Journey's "Dry run" and reporting to see the event payload and diagnose which key ("label", "url", or other) is actually populated with your clickable's display text 

https://experienceleague.adobe.com/en/docs/journey-optimizer/using/channels/email/design-email/add-content/message-tracking

now adding to what @davidkangni  highlighted, if you need granular level details use custom event.

1. Create a Custom (Unitary) Event in Configurations

   • In AJO, navigate to Configurations > Events.
   • Create a new event of type Unitary.
   • Configure its fields to capture specific click data—such as the label, URL, or any custom identifier for your email links (see guide).

2. Update Your Email/Tracking to Emit This Unitary Event

   • Ensure your email links (or the environment handling clicks) sends the custom event to Journey Optimizer, including the important fields (label, URL, etc.).
   • This could be accomplished via a webhook, API call, or Adobe Web SDK embedded in a landing page 
   • Example event payload:

     {
       "eventType": "email.linkClick",
       "linkLabel": "Voglio essere ricontattato",
       "linkUrl": "https://example.com/callback"
     }
     

3. Use Your Custom Event as Journey Listener

   • In the journey, set the trigger/listener node to watch for this unitary event.
   • In subsequent condition nodes, you can reference the event's fields (like linkLabel) and make precise splits or trigger actions.