How Google Search Engine Works in 2018

Google Search Engine on Macbook Pro

If you are an SEO expert or simply a business owner who wants to optimize your website you need to have an understanding behind the changes that you are about to make.

New and experienced SEOs often ask the question, how Google search engine works? How do they rank search results?

Google is an industry leader which is why many SEO experts need to learn how to follow its guidelines.

When Google makes an update to their search algorithm, other search engines are likely to follow suit.

Even if the smaller search engines are not as advanced as the top dog, they still operate with the same principles in mind.

If you rank well with the industry leader, you won’t have to worry about ranking on the other smaller search engines.

How Google Gets Web Info

Google can access and store information about online content.

They use bots or spiders to crawl web pages and strips out the HTML content.

The next step is indexing or recording and storing all the information that was crawled by the spiders.

When a user searches Google, the search engine does not crawl the web immediately to look for results.

They search their index first which is their existing database of online content.

This is a faster process than scanning the whole internet for information. This is why it takes only half a second for Google to scan billions of pages. They do the scan on their database.

Spiders crawl the web so that new content can be added to this index. This process ensures that the latest and most up to date pages are crawled and indexed on Google.

From a site owner’s point of view, you need to know that if your site is not indexed, it won’t appear in search results.

Google’s spider, called the Googlebot crawls the web for new content based on an algorithm.

The software determines which sites to crawl, how often and how many pages to store from a site.

The crawling process starts with a list of URLs generated from former crawls. As the bot visits these pages, it can detect links and adds them to a list of pages to scan.

From there, it will crawl the new pages and look for new sites or changes in the sites that was crawled in the past.

All of these updates and changes are added to Google’s index.

Ranking Websites

When a user types in a search query, Google scans its index for relevant pages and publishes the ones that their algorithm has determined to be the best answer for the search.

Google keeps it’s algorithm details a secret but it considers over 200 ranking factors that determine which web pages are most relevant to search queries.

The algorithm is also being updated regularly to give users the best possible results.

One of the known factors behind Google’s algorithm ranking is PageRank.

This is a measure of the significance of a page based on the incoming links from other pages.

This is why organic backlinks play a significant role in page ranking.

All links are not considered equal based on PageRank.

Links from reputable sites carry more weight versus links from spam links.

Changes on how Google uses its algorithm started in 2003. In years previous to this many experts used tactics that exploited how Google algorithms worked.

With the Florida update, Google started to penalize sites using SEO tactics that gave poor experience to users.

It had such an impact that it caused an outcry from affected site owners.

Spammy practices like keyword stuffing were penalized which left SEOs who used them very unhappy.

This signaled a new era where the emphasis was on providing a great user experience for Google users, something which they still prioritize til this day.

Google’s more recent updates are aimed at penalizing SEOs who use black hat tactics. They focus on user security and making it easier to access information directly on search pages.

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