Search Engines

Understanding how search engines work, Google in particular, is important when working in SEO. The basics of crawling and indexing are amazingly useful to understand if you want to rank your own content.

Additionally, Google updates its algorithm several times a year. Understanding the more significant updates, and how they work, can help you to craft content and SEO strategies that are up-to-date.

We've written extensively about how search engines work, and included some of the top resources here. You can also browse the latest posts on search engines from the Moz blog below.

How Search Engines Work : New to SEO? Start with the basics of how search engines operate with our free beginner's guide.

Search Engine Ranking and Visibility : Learn the fundamentals of how search engines rank content on search engine result pages.

Google Algorithm Update History : A complete history of Google algorithm updates since 2000. This includes important links and references for understanding how Google works.

How Search Engines Value Links : Search engines work off a number of signals, but two of the most important are content and links. In this video, Rand Fishkin explains the basics of link evaluation.

MozCast : Is Google updating it's algorithm as we speak? MozCast is the Google algorithm weather report, so you can see how much Google results are changing each day.

Most Recent Articles on Search Engines

Title Tag Rewrites: 7 Months Later
Dr. Peter J. Meyers

Title Tag Rewrites: 7 Months Later

Back in August, we analyzed 10,000 SERPs and found that Google was rewriting 58% of the title tags we were able to track. In September, after some serious objections from the SEO community, Google made changes so that “title elements are now used around 87% of the time”. This immediately raises two questions. First, has the situation improved? Second, why the huge mismatch between our numbers? Let’s take a look.

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Understanding the Google Ads Auction & Why Ad Rank Is Important
Tanuja Mahdavi

Understanding the Google Ads Auction & Why Ad Rank Is Important

When there is a search query on Google, Google Ads runs a quick auction to determine which ads will show for that query, and what the ad positions should be. This ad auction is repeated every time an ad is eligible to appear for a search term, and is an integral part of the SERP landscape. To help understand it, Tanuja covers the what, how, and why behind the Google Ads auction.