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.

Purple Yahoo! and Search Engine UI Testing
Search Engines

Purple Yahoo! and Search Engine UI Testing

Mystery Guest and I were running some queries on Yahoo! earlier this afternoon, when we received my personal favorite search results UI test pages, the beloved Purple Yahoo! Purple Yahoo! is a rare beast, from what I've seen. This is only the second time I can remember being served the results, though I know others have seen it before ...
7 Reasons Why Search Engines Don't Return Relevant Results 100% of the Time
Search Engines

7 Reasons Why Search Engines Don't Return Relevant Results 100% of the Time

While search engine representatives and light hatters (the whitest of the white hatters) say that having great, link-worthy content and links is enough to get high rankings, there are many sites with these traits that do not get listed for the words that matter (the ones that send serious traffic). If it were so easy and every page that deserved a high ranking had it, there would be n...
Remarkable Openness from Google's Black Box Thanks to Saul Hansel
Search Engines

Remarkable Openness from Google's Black Box Thanks to Saul Hansel

I'm more than a little skeptical of mainstream media articles about the search engines. With so many terrible experiences - inaccuracy, bias, shallow information, agenda-based reporting - it's easy to see why. However, today I'm thrilled to see an article from Saul Hansel in the NY Times that's not only impeccably well-written, but informative to even those of in most deeply inside the search i...
Why does Google hate me?
Search Engines

Why does Google hate me?

Well, not me specifically - but my MySpace page.A few months back I googled the title of my MySpace page. Just out of curiosity. Surprisingly I was in the #1 position. I say it was surprising because the title of the page is "Unattached and Unavailable". Those are two common words that actually appear often enough online that you wouldn't thin...
What is the biggest benefit of the Sandbox effect to Google?
Search Engines

What is the biggest benefit of the Sandbox effect to Google?

This one might have been obvious for many people, but it just hit me today! I don't want to start a fight on this, I was just wondering if all of you ever saw it that way about the Sandbox. There are some days that you know that you are just too close to data to really be able to find what you are searching for. Our company just hired a director to develop the French market in Eur...
Two Cents on Personalized Search
Search Engines

Two Cents on Personalized Search

Have you paid any attention to personalized search yet? If you stay logged into one of your Google accounts such as Gmail, your search history will start to accumulate. As your history grows Google starts to modify the SERPs that they send you in ways that they think will be more pleasing. I first noticed this a few days ago when Google seemed to know which site belonged to me in the SERPs....
A Visit to Google Kirkland
Search Engines

A Visit to Google Kirkland

Danny Sullivan was in town over the weekend and on Saturday night, Vanessa Fox from Sitemaps invited Mystery Guest and me over to Google's Kirkland offices. We had a ton of fun and got to meet some new (and very friendly) Googlers. Just a few photos: ...

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