Using the correct image file format can improve website presentation, speed up page load times, and boost search engine ranking. The most popular web image file formats are JPG, PNG, WebP, GIF, and SVG, each with its own strengths and weaknesses. Compressed images reduce data size and ensure faster load times in web browsers, but lossy compression can compromise visual quality. Lossless compression preserves visual quality without reducing the image size. The choice of format depends on the use case, such as photographs, graphics, logos, or animations. For example, JPG is suitable for high-resolution photographs, while PNG is often used for graphics and logos with fine detail and transparency. WebP offers better overall compression and smaller file sizes than comparable JPEG images, but its browser compatibility can be a challenge. SVG provides infinite scalability, efficiency, and accessibility benefits, making it a popular choice for icons, logos, and illustrations. Mastering SVG requires education and effort, but its flexibility and performance make it an attractive option. The Contentful Images API simplifies image management by hosting SVGs, providing metadata images, and offering various transformations and compression options. By choosing the right image file format and leveraging the Contentful Images API, developers can optimize their digital experiences for better user experience, search engine rankings, and conversion rates.