How Search Engines Work: Six Questions Answered
Today search engines play a pivotal role in the growth of your business. With right tactics you can increase traffic to your website and improve sales.
By knowing how the search engines work, you can gain a better SEO insight. Ahrefs contributor Joshua Hardwick has answered six questions related to search engines and how they work.
Hardwick says, “Search engines work by taking a list of known URLs, which then go to the scheduler. The scheduler decides when to crawl each URL. Crawled pages then go to the parser where vital information is extracted and indexed. Parsed links go to the scheduler, which prioritizes their crawling and re-crawling.
When you search for something, search engines return matching pages, and algorithms rank them by relevance.
Here’s a diagram from Google showing this process:
A simple diagram showing how search engines work by Google [source].
We’ll cover ranking algorithms shortly. First, let’s drill deeper into the mechanisms used to build and maintain a web index to make sure we understand how they work.
These are scheduling, crawling, parsing, and indexing“.
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