The most commonly used image formats in email marketing are JPEG, PNG, and GIF. Each has its unique advantages:
- JPEG: Ideal for photographs and complex images due to its balance of quality and file size. - PNG: Best for images requiring transparency and those that need to retain a high level of detail. - GIF: Useful for simple animations and images with limited color palettes.
Always ensure that your images are compressed to reduce file size while maintaining quality. Tools like TinyPNG and JPEG-Optimizer can help.