Sufficient consensus
Search engine optimization improves the visibility of a page in search results. The settled parts are technical access for crawlers, page speed, a readable structure, titles and descriptions that match the query, and content that answers it.
Former lexical search engines became semantic search engines. Matching a string stopped being the work. Covering a meaning started being the work.

What the result pages leave out
These belong to the subject. People ask about them. They are missing from the agreed coverage.
- Result quality after the click. Position is recorded and reported. What the visitor did with the page afterwards leaves almost no trace in the usual reports.
- The change the reader wanted. Someone reads to be able to do something afterwards. Almost no optimization brief names that outcome.
- Sufficiency instead of coverage. Beyond a certain point, adding semantically related sections makes a page longer and the answer harder to find.
- The cost of being ignored. A page that ranks and is skipped costs the same as a page that ranks and is read. Only one of them returns anything.
- What the competitor cannot copy. Ranking work is copyable within weeks. A first-hand observation is not.
What people actually want to know
- How do I know whether the people who found my page actually got what they needed?
- My position has not moved and my traffic keeps falling. What changed?
- How much of my content exists because a tool suggested the term, and not because a reader needs it?
- Which part of my page would a reader miss if I deleted it tomorrow?
A result is good when the search journey ends in satisfaction. Depending on the intent that may be a yes, a single number, or a long description of a complex topic.
Everything else is a ranking for the sake of ranking.