The Algorithms: Google’s algorithms are the worlds best kept secret. They are the instructions by which Google operates and produces it’s search results, and is the reason for Google’s tremendous success. It is estimated that Google makes 500 to 600 adjustments to its algorithms each year, and a few times a year usually, Google announces a major “core” update that causes the SEO industry to scramble to figure out the results of the update and how it impacted the Google rankings of the websites and blogs they optimize and manage. These large and small adjustments are made in an effort to continually improve search results and to prevent search results from being manipulated.
The Search Bots: Each search engine has it’s own search bots, also called “crawlers” or “spiders”. Google has sixteen different bots. Their job again in simple terms is to continuously crawl or scan the web pages and blog posts Google already knows of and new pages and posts they find links to and that were submitted manually to Google. The two primary Googlebots are Googlebot Desktop and Googlebot Smartphone. These two Googlebots cache the current versions of the pages and posts they crawl and send all that they cache back to Google. Googlebots operate under a set of rules or instructions that are always being adjusted and refined. Most websites are crawled every 4 to 30 days. Websites that are constantly being updated such as major news websites are crawled more often. Conversely, pages that are rarely if ever updated are crawled less and less often as time passes without any changes.
The Index: Google’s index is essentially a giant database of web pages and posts that have been visited by Google’s bots, evaluated by Google, (indexed) and prepared to appear in Google’s search results. (It is worth noting that Google does not index every page and post its bots cache and send back to Google.) Think of Google’s index as a library with billions of books with trillions of pages organized in a way that allows Google to quickly produce search results based on the current algorithm.
The Search Results: In 2022, Google was being used to perform 70,000+ searches each second. And every Google search produces results that are governed entirely by Google’s algorithms. When a search is performed in Google, Google’s algorithms evaluate the search phrase and return results that are most relevant to what information Google thinks you are searching for based on your search phrase and how it was composed. The rankings of these search results or the order in which they appear is based on a great number of factors. The key phrases that appear in the web page’s content, the quality and relevance of the content in a web page and its website, links to a web page from other authoritative websites, how mobile friendly the website is, and many other factors that Google uses to evaluate and rank websites.