What Is an SEO and AI Search Agency — And Why Your Business Needs One in 2026

If you have searched for marketing help recently, you have probably noticed that the term "SEO agency" has expanded. Some agencies now call themselves AI search agencies or GEO specialists. Others are adding these terms to existing service pages without meaningfully changing what they do. The terminology has multiplied faster than most business owners have had time to understand what any of it means. This post cuts through that noise. What does an SEO and AI search agency actually do in 2026? How is it different from three years ago? What does your business lose by not working with one? And how do you tell the difference between an agency that genuinely understands this shift and one that renamed its 2022 playbook with new acronyms?