When an interactive element (link, button, form field, selectable element, etc.) receives focus, a visual indicator shows so a user can see what element they are currently on.
What to do:
- Style your website so that any interactive element shows visible focus when it receives focus
Plain English Explanation:
Make sure that when someone tabs through your website, any interactive element (such as a link or form field) that you stop on has a focus indicator of some kind.
Typically, a focus indicator is a rectangle box around a link or a vertical bar displayed in a text field.
If you tab through the link above, you can see a focus indicator in action.
I recommend you make focus very clear and conspicuous by providing a strong, contrasting color for a box border or potentially highlighting an input field such as a search box.
There are many styles you can use to provide visible focus.