During manual evaluation of pages using keyboard navigation, observe and ensure that there is a visual focus indicator present.
A visual focus indicator for the purposes of this specific criterion is only concerned that there is something visible which clearly defines the element which has keyboard focus. This can take the form of an underline, outline, border, color shift, or background change (among others). The focus indicator for the purpose of this criterion does NOT have a color contrast requirement (that is applicable to 1.4.11 Non-text Contrast, or Guideline 39).
If you are unable to discern a focus indicator, then mark a failure. If you cannot quickly identify where you are on the page (e..g., the focus indicator is very faint or is clipped), then mark a failure.