The contrasts between general SEO and enterprise SEO are simple: the latter is all about optimising search visibility for larger companies, websites, and groups with layers of content, applications, and landing pages.
Bigger optimisations and networks might have thousands or even millions of web pages of varying importance and relevance to search. They need as many of them as possible to rank for a range of niche, general, short and long-tail keywords to capture leads and conversions, as well as brand share of voice.