CSS minification is a crucial optimization practice aimed at improving web performance by reducing the file size of CSS files, which are render-blocking resources. This process involves removing unnecessary spaces, characters, and formatting from CSS code, allowing faster download and rendering times, particularly beneficial for users on slow connections or mobile devices. Minification, distinct from compression, directly alters code content to improve performance, while compression compacts files for quicker transmission. Various tools and methods exist for CSS minification, ranging from online and command-line tools to integrating it into build processes with tools like webpack or Gulp. Beyond minification, removing unused CSS further enhances performance by ensuring only essential styles are loaded, which is especially important for complex web applications. Techniques such as inlining critical CSS and using tools like PurgeCSS aid in optimizing CSS delivery, ensuring more efficient and faster user experiences. Additionally, using content delivery networks (CDNs) and WordPress plugins can automate and streamline CSS minification and optimization tasks, contributing to a faster, more responsive web.