The Platform App Builder exam is organised into five domains. This is a plain-English summary with the current Salesforce weightings, after the December 2025 restructure; the official exam guide is authoritative. Older nine-section material is out of date.
| # | Domain | Official weight |
|---|---|---|
| 1 | Salesforce Fundamentals | 23% |
| 2 | Data Modeling and Management | 22% |
| 3 | Business Logic and Process Automation | 28% |
| 4 | User Interface | 17% |
| 5 | App Deployment | 10% |
1 - Salesforce Fundamentals
The platform itself: the multi-tenant model, the declarative build approach, apps, tabs and the AppExchange, and the recurring judgement of when to solve a requirement with clicks versus when it genuinely needs code.
2 - Data Modeling and Management
The data layer: standard and custom objects, field types, and the relationships that connect them - lookup, master-detail and the junction object that creates a many-to-many. Includes formula fields and roll-up summary fields, and sensible schema design.
3 - Business Logic and Process Automation
The largest domain. Declarative business logic with validation rules, and automation with Flow: screen, record-triggered, scheduled and autolaunched flows. The emphasis is on choosing the right tool and Flow type for a given requirement.
4 - User Interface
What users see and use: the Lightning App Builder for app, home and record pages, plus list views, page layouts and declarative components, and assembling a Lightning app and its navigation.
5 - App Deployment
Moving work safely from development to production: sandboxes, change sets for migrating metadata between related orgs, and packages (managed and unmanaged), including distribution through the AppExchange.