How do Google and other search engines determine keywords?

@elmo.conroy 

Search engines determine keywords through a process called "indexing." They use sophisticated algorithms to crawl websites, analyze the content, and determine what words and phrases are frequently used and relevant to the content on the page. These keywords and phrases are then stored in the search engine's index, and used to match search queries with relevant content. Other factors such as the relevance, freshness, and authority of the content can also impact keyword rankings in search results.