The first step to optimize your images for SEO is to choose the right format for your needs. There are different types of image formats, such as JPEG, PNG, GIF, and WebP, each with its own advantages and disadvantages. For example, JPEG is a popular format that compresses images well and preserves colors, but it can also reduce the sharpness and detail of your photos. PNG is a format that supports transparency and preserves quality, but it can also result in larger file sizes. GIF is a format that supports animation and is suitable for simple graphics, but it can also have limited colors and pixelation. WebP is a newer format that combines the benefits of JPEG and PNG, but it can also have compatibility issues with some browsers and devices. To choose the best format for your images, you need to consider factors such as the purpose, content, size, and quality of your images, as well as the compatibility and loading speed of your website.