SEO means “search engine optimization.” It is the work of making a website's pages easier for search engines to understand and easier for people to discover.
Clear page titles, useful writing, and links that work can all help a search engine describe a page. For example, a guide called “How to save a file” is easier to understand than one called “More information.”
SEO cannot guarantee a page will appear first in results. Focus on making genuinely useful pages and describing them honestly, rather than trying to trick search engines.