Integration support is essential for B2B SaaS products with integrations, as it helps bridge the gap between customer understanding and the technical complexities of using the integrations. Effective integration support involves not just reactive assistance but also proactive measures like productizing integrations to scale support, providing comprehensive documentation, and empowering customers through self-service options such as dashboards and marketplaces. Challenges include scaling support, authentication issues, logging, monitoring, error handling, and documentation, all of which can be mitigated by thoughtful integration design and management. Tools like Prismatic can assist by providing infrastructure, support data, and customer empowerment features, thus enhancing the efficiency and effectiveness of integration support strategies.