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

Getting Adwords Qualified
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Getting Adwords Qualified

Here I am making my second post on here.After being burned by a hacker on adwords, having a limited knowledge of the Google Adwords program, but enough to push a business well, I was forced to look at some procedures of google such as the fraud reporting procedure.This also prompted me to decide to get adwords qualified.At first when i looked at it I thought, "couldnt ...

Google's Advice - Godsend Or Gimmick?
Jane Copland

Google's Advice - Godsend Or Gimmick?

What's the deal with all this advice that Google employees like to give us, then? Of all the search engines (and of many companies of Google's size and scope), Google appears to be the most open with its distribution of information, its interactions with its users and its willingness to give us advice.

SEO for Video
David Iwanow

SEO for Video

Its 3am and I feel the perfect time to post my first blog, and im wondering about how Google will start to understand video going forward. Universal search is already presenting results where it is relevant to your query, and slowly multiple videos are being displayed, does that mean that Google is understanding video better already or just really giving us what they already know we want....

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The X-Files of Google: 10 Inexplicably Weird Search Results
Rand Fishkin

The X-Files of Google: 10 Inexplicably Weird Search Results

Sometimes you come across a set of search results that just don't make any sense. For most ordinary users, I suspect they probably just move on to the next query, but for those of us deeply embedded in the world of search and SEO, these noggin'-scratchers just keep on itchin'. I've collected these ten over the past couple months and figured I'd share them on the blog with the hopes of g...

How Accurate Are the Numbers in Google's Keyword Tool?
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How Accurate Are the Numbers in Google's Keyword Tool?

I've been lucky enough to be traveling out of the country since late June (if you get the chance to go to Morocco -- DO IT!) and was pleasantly surprised to see that Google has added approximate search numbers to their Keyword Tool. However, I started to wonder just how close the approximate numbers were to the accurate numbers. So, I decided to look at the numbers from one ...

Google Refuses to Penalize Me for Keyword Stuffing
Darren Slatten

Google Refuses to Penalize Me for Keyword Stuffing

What's up, YOUmoz! Ok, enough small talk. I'll get right to the point. I have a 2-page website that I created for the sole purpose of having something to link to from my SEOmoz profile page. My site doesn't really do anything or provide any useful information, but I use it to experiment on sometimes. Over the past 3 months, I've written several YOUmoz po...

Where Do the Clicks Go?
K

Where Do the Clicks Go?

One of the challenges that small businesses have is being found in local search. I have a chart based on some studies that I share with prospective clients to show them the importance of optimizing their whole site - not just buy PPC with some keywords. When we optimize a business site, we like to look at all aspects and fine tune from messaging to sales conversions. We ask the customer to...