Mobile-First Indexing is an approach by search engines, primarily Google, where the primary source for evaluating a page is its mobile version. Therefore, it is critically important for websites to be optimized for mobile devices, have a responsive design, fast loading times, and clear content on smaller screens. At a time when most users browse the web primarily through their phones, Mobile-First Indexing significantly impacts SEO results. This method also improves user experience and reduces bounce rates.