What goals does on-page optimization pursue?

The goal of internal (on-page) optimization is to make every page of a site:

• clear to the search engine,
• convenient for the user,
• relevant to a specific query,
• capable of reaching the top.

Here it is in more detail:

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#1. Increasing relevance

Embedding keywords, headings, descriptions helps the search engine accurately match the page to the query. Goal: for the bot to understand: "This page answers exactly this question".

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#2. Improving indexing

Clean structure, semantic tags, a sitemap, internal linking make the site friendly to crawl and analyze. Goal: for the bot not to get lost and to index everything it needs to.

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#3. Optimizing user experience (UX)

Readable text, fast loading, responsiveness, logical blocks. Goal: for the user to stay, read, not leave right away and to send good behavioral signals.

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#4. Building content structure and hierarchy

Headings, subheadings, logic help both the user and the search engine navigate. Goal: to make content clear, logical, and thorough.

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#5. Supporting SEO growth without ads

Well-optimized pages pull in traffic over time, without an advertising budget. Goal: long-term organic growth.

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Conclusion: on-page optimization is the foundation: without it a page can be useful, but the search engine won't understand it, and the user won't read it. Which means there will be no traffic.