Google Search is a fully-automated search engine that uses software known as web crawlers that explore the web regularly to find pages to add to our index.

When you search, Google looks through hundreds of billions of webpages and other digital content organized in our Search index to find helpful information - more information than all of the libraries of the world. Most of our Search index is built through the work of software known as crawlers.

Every year, we see trillions of searches. Google's search features ensure that you get the right information at the right time in the format that's most useful to your query. Sometimes it's a web page, and sometimes it's real-world information like a map or inventory at a local store.

The Google Search algorithm is a complex system Google uses to decide how pages will rank in the search results. The algorithm is believed to consider hundreds of factors. Content relevance, quality, and the user experience (UX) are among the most important ones (more on each of these below).