Avoid using questions as section headings; they take users longer to scan and understand than simple headings, and users cannot take any meaning from them at a quick glance. This makes it harder to find the information they need quickly.
Guidance from the Government Digital Service (GDS) is to use short, clear label headings that put the most important information first. These allow users to quickly scan the headings and find the topic they are interested in. For example, “Definition of international migration” is much easier to take meaning from than “What is the standard definition of international migration?”.