The No Mouse Challenge is a global effort to raise awareness about accessible web design. Try using your website without a mouse. Use the keyboard instead. Is it possible to access all features and operate all buttons, sliders, and other controls?

https://nomouse.org/

Don't buy into the myth that "accessibility is only about adding alternative text to images." Alt text is important, of course. But there is so much more to accessibility, including headline structure, functional controls, color contrast, link text, plain language, and more.