# Build Flow Logic

- [Conditional Nodes](/appizap-workflow-builder-pro/build-flow-logic/conditional-nodes.md)
- [Data Merging](/appizap-workflow-builder-pro/build-flow-logic/data-merging.md): Combine data streams by using various nodes to match your workflow needs.
- [Looping](/appizap-workflow-builder-pro/build-flow-logic/looping.md)
- [Waiting](/appizap-workflow-builder-pro/build-flow-logic/waiting.md)
- [Sub-Workflow](/appizap-workflow-builder-pro/build-flow-logic/sub-workflow.md): One workflow can be called from another to create modular workflows, similar to microservices and avoid memory issues.
- [Execution Order](/appizap-workflow-builder-pro/build-flow-logic/execution-order.md)