Most websites exist to inform the public about something-or-other. The website owner may have another goal in mind, like selling products, or advertising their dental practice, or covering the latest news on Afghanistan, or any of a zillion other topic areas. Regardless of the larger goal, every website exists to inform people about topics chosen by the website owner. Pretty much every website owner hopes to generate a large audience, one large enough to justify their effort on the website. Generally speaking the more traffic on a website the more opportunity to satisfy goals like selling things to the audience, earning revenue, and so on.
In other words, one of the primary questions of all website owners, whether they just started or whether they've been publishing websites for 25 years, is how to get more traffic. The problem is most of the advice out there is overly packaged in pristine marketing-speak, and loses sight of another core purpose -- informing the public.