In modern web development, several critical mistakes frequently hinder web accessibility. Developers often neglect semantic HTML, relying instead on non-semantic `div` and `span` elements, which obscure page structure for screen readers and assistive technologies. A common pitfall is the absence or incorrect application of ARIA attributes, leading to misleading information or unnecessary complexity rather than enhanced clarity. Furthermore, insufficient keyboard navigation remains a prevalent oversight, where interactive elements lack proper tab order or clear focus indicators, making content inaccessible to keyboard-only users. Other significant errors include: