Salesforce Journey Builder has multiple entry sources, which define how contacts enter a journey. Here are the different types:

1. Data-Based Entry Sources

• Data Extension (DE) Entry – Uses a Salesforce Marketing Cloud data extension to inject contacts.
• API Event – Contacts enter when an external system triggers an API call to Marketing Cloud.
• CloudPages Form Submit – Contacts enter upon submitting a form created with CloudPages.

2. Event-Based Entry Sources

• Salesforce Data – Uses Salesforce CRM events (like Lead creation, Opportunity update) as triggers.
• Inbound Chat/Messaging – Journeys start when contacts send messages via WhatsApp, SMS, or Chat.
• Email Engagement – Entry is triggered by opens, clicks, or bounces from an email campaign.
• Mobile App Event – Contacts enter based on mobile app behaviors (e.g., app opens, purchases).
• Push Notification Engagement – Users enter upon tapping or dismissing a push notification.