Integrations are the connective tissue of business software. They sync customers between a website and a CRM, push payments into accounting, create helpdesk tickets from forms, or feed documents into an automation. Each one involves authentication, mapping fields between systems, and handling errors.
Most integration failures come from the unhappy paths, such as duplicate events, timeouts, rate limits, and changed fields. Robust integrations are idempotent, retry with backoff, log what they did, and alert someone when they stop working.