What does the term "content optimization" mean?

The term "content optimization" refers to the process of improving content so that it:

1. Better answers the audience's queries - not just "well written", but written the way people search, read, and save it.
2. Is noticeable in search engines - this includes keywords, text structure, metadata, headings, subheadings, links.
3. Improves behavioral metrics - retention, scroll depth, clickability, time on page.
4. Supports the business goal - engagement, sales, click-throughs, lead generation, etc.

Roughly speaking, this is when content is not just "nicely written", but works toward a result - attracts, retains, and leads to action.