Ensuring web accessibility through guidelines like WCAG is crucial for inclusivity, usability, and legal compliance. It improves user experience for all, not just those with disabilities, by providing clearer navigation, better visual design, and advanced interactivity. Accessible websites also offer SEO and marketing advantages such as better crawlability, increased engagement, and expanded audience reach. Embracing web accessibility is not only a smart business move but also essential for creating a positive brand image and reaching a wider audience in the digital world.