A page's ranking is where it is listed for a specific query. Rankings are not fixed. They vary by the exact wording, the person's location and device, their history and the search engine's current systems, so two people can see different results for the same search.
Search engines weigh many signals, including how well the page matches the search intent, the quality and usefulness of the content, links from other sites, and technical factors such as page experience. No one outside the search engine knows the exact recipe, and it changes.
Track ranking as a trend across a set of queries, using your search console and a rank tracker, instead of obsessing over a single position. Remember that a page must be crawled and indexed first (crawling, indexing), and that AI answers add another place to be seen (AI visibility).
Related: Search Engine Optimization, Technical SEO.