Salsa Digital shared a guide which explores Drupal's theming system, detailing how it enhances user experience, brand consistency, and website performance through custom themes. It emphasizes the importance of Drupal's modular architecture, allowing for extensive customization in layout, colours, and other visual elements to align with specific branding needs. The article outlines the process of creating a custom theme, from defining project requirements to selecting base themes and implementing security and performance best practices. Additionally, it discusses the benefits of responsive design, ensuring websites adapt to various devices and screen sizes, thereby enhancing accessibility and user engagement.