Launching a web app in a business context requires careful attention to various organizational, technical, and legal aspects. Preparation involves agreeing on a technology set, covering infrastructure costs, and determining an operating model and business plan. Infrastructure complexity has increased with cloud-first setups, necessitating automated build processes and error tracking. A solid technical foundation with end-to-end tests, minified resources, and cache-friendly structures is crucial for stability and performance. Accessibility and mobile compatibility are essential for a broad user base, requiring mobile-friendly views and optimized resources. Security measures such as encrypted connections and reliable authentication are fundamental, alongside compliance with privacy regulations like GDPR. Performance optimization through caching and lazy loading and the use of web analytics for user insights and SEO are also highlighted. Additionally, fancy additions like in-app tutorials can enhance user experience, while the overall preparation serves as a guideline to address potential challenges and ensure the app's success.