When building a web application using the Jamstack, it's essential to choose the right APIs to boost performance, scalability, and developer experience. The key is to balance technical quality with business needs, selecting providers that offer mature solutions with accessible documentation, flexible integration options, and smart UI strategies. Consider factors such as API maturity, data complexity, policies and support, security and compliance, and release policies when making your decision. By choosing the right APIs, developers can take advantage of the Jamstack's flexibility and freedom to build innovative web applications.