Animated Gif Banner Design for Newsletter - 600x300px

We are seeking a talented graphic designer to create an engaging animated GIF banner for our upcoming newsletter. The banner should be horizontal with dimensions of 600x300 pixels. The primary goal is to capture subscriber attention and convey a specific message (to be provided upon project start). We are looking for a creative and professional design that aligns with our brand identity. The final deliverable must be a high-quality animated GIF file suitable for email marketing campaigns.