Webpages in larger organizations have grown organically, and maybe, if you had a good webmaster and content writer, they were at least keyword specific enough to rank somewhere on the Search Engines. Unfortunately, smart competitors can now kick your ass with a simple search engine strategy built around Topic Clusters and Pillar Pages.
You can find a ton of information on the web about Topic Clusters and Pillar pages, so this is the executive overview (and what you pay me for). This information is mostly drawn from https://blog.hubspot.com/news-trends/topic-clusters-seo.
These two images show the “old” and the “new” method of interlocking your web pages.
New Way – Create a single 2000 word pillar pages and 30ish cluster pages of approximately 1000 words each