November 30 2009
Does Website Structure Matter to SEO?
Does Website structure matter to SEO is a great question that should have been asked about 10 years ago. It’s being answered on many SEO blogs and forums but not in a very formal way, in my opinion.
Website structure helps your search engine optimization in several ways. Let’s take a brief look at how that plays out.
- Website structure directly influences your site’s crawlability
- Website structure facilitates or inhibits growth
- Website structure may improve your on-site optimization
- Website structure may improve your SERP optimization
Website structure directly influences site crawlability – This point is being made by more people than ever but it seems to be trapped within the thought circles of the SEO community. The difference between a crawlable site and a crawl-inhibiting site structure is most easily measured through cache data freshness. Keep in mind that search engines don’t necessarily recache your page every time they fetch it, but the more often your deep content is recached, the more likely that your site has good crawlability.
Good crawlability ensures that a search engine is most likely to fetch your most important pages more often than others, but also that it’s most likely to fetch a lot of pages rather than just a few. You manage or influence crawl by pointing a lot of links to HTML sitemap pages, embedding links to sibling pages in on-page navigation, and using local hub structures for logical sections of your site.
I generally recommend building at least 3 internal links (from as many different parts of your site) to each page in a complex site.
Website structure facilitates or inhibits growth – If you had to add a new section to your site today, one that is large enough to contain 5 important sub-sections, each loaded with lots of content (pages), what would it take to update your navigation? If you’re thinking, “I’d have to totally rewrite the nav system” then either your navigation has outgrown its usefulness or else you planned poorly for the future.
You should be able to increase the size of your Website by about 30% without having to restructure on-site navigation. This means you won’t severely inhibit crawlability. New sections/content should compensate for their crawl-draining value by adding more internal links to the mix. This is not about passing anchor text to your competitive pages. This is about ensuring that spiders keep finding links to crawl that are deemed important enough to crawl.
If you cannot easily add 30% more content to your site, then you need to start working on a rewrite of the navigation system before you find yourself in crawl crisis mode. It’s broken if you don’t have unused navigational bandwidth, so fix it as soon as possible.
Website structure may improve your on-site navigation – There are four points of optimization that any Web publisher can influence: on-page, on-site, off-site, and SERP. URL structure is an on-site optimization factor, rather than an on-page factor (although most people incorrectly treat it as an on-page factor). Because you may have nested directories, your URL structure may be very complex.
If you believe that search engines pay attention to page URLs (and you should), then your Website structure can be enhanced to help your URLs become more meaningful. You do want to keep them short. You do NOT want to include superfluous sub-directories just for the sake of embedding keywords. You do want to use important, relevant keywords in the page URLs.
Website structure may improve your SERP optimization – I often ask my students, “What is the first thing people see when they look for content on the Web?” Usually no one gets the answer right. It’s the first search results page, not the first Website listed at number 1. What people see on that search results page influences their decision to click through or not click through.
It is possible, for example, to influence people to click on the 2nd result more often than the first, if the 2nd result is clearly more relevant to a query than the 1st result. This happens more often than most people in the SEO industry realize. And keep in mind that “relevance” to a user may be very different from what it seems to be to a search engine.
The user may be looking for a very specific page, and may not be interested in the more algorithmically acceptable content listed above that page. Search engines cannot always deduce what the searchers really want.
Last word on Website structure – There is actually much more to be said about “Website structure” and SEO because, frankly, it goes beyond simple URL construction. You also have to look at page composition factors (are you embedding images, Javascript, iframes, etc.?). And you have to look at how presentation changes from page to page and section to section. Jarring or incongruous transitions may signal some content issues that will impact your search engine optimization.
If you don’t have a consistent page composition structure throughout your site your ability to target keywords and track return on investment for organic SEO is degraded. Uncoordinated page composition usually produces less converting traffic than coordinated page composition.
You need to look at things like percentage breakdowns of page content into boilerplate, injected keywords, original copy, advertising, etc. You also need to look at copy placement, structures used for formatting copy, and even HTML coherency.
Although writing W3C-compliant code is not necessary for search engine optimization, you can ensure your code is not broken by passing compliance tests. I think most people in the industry now agree that if nothing else, writing W3C-compliant code eliminates the headache of tracing broken structures that might inadvertently hide some indexable content from search engine parsers.
So the next time someone asks you, “Does Website structure matter to SEO?”, you’re in a position not only to say yes, but also to explain why and how. And that’s a good thing.
Written by Michael Martinez
