Websites are created for a variety of reasons (your website's objectives).
They may be 'portfolio' sites which are in effect an archive of historical events, projects, works of art, etc. The objective of such sites might be to act as a form of CV.
Or they may be 'call to action' sites which are designed to get visitors to respond in some way, perhaps to buy something, attend a meeting, commission work, join a club, etc.
This section describes and demonstrates a range of common functions that will assist in achieving your site's objectives.