“Linkability” is a URL’s ability to incite someone to create an inbound link to it. Every URL on your site has measurable linkability… some just have (far) more linkability than others. This article guides motivated link builders through methods, metrics and speculations for calculating – and growing – the linkability of individual URLs.

When you know and can adequately express a URL’s linkability, you can make clear demonstrations for linkability-increasing changes. In cases of large-scale link building efforts you can better identify and work towards a “good-enough” linkability for a large number of target URLs. Finally, meaningful linkability metrics could help link building tool creators… Wouldn’t it be nice to paste in a URL and have that page’s linkability measured for you? ;)

Well, until that tool’s created, this article will help you calculate the linkability of the URLs you plan to build links to. Here’s what you’ll find:

>> Just a Tad Bit More on Link Building and “Linkability”
>> Preparing for Linkability Assessment
>> 5 Subjective Linkability Metrics: By-Hand Analysis
>> 4 Inbound Link Trends and Patterns
>> 6 Objective, Large-Scale Linkability Metrics: Machine Analysis
>> Linkability Analysis Tools
>> More Linkability Resources

>> Just a Tad Bit More on Link Building and “Linkability”
We view link building as having two distinct stages. The first stage is when you build and/or optimize links to your most important URLs, from all the proven link opportunities that currently exist (all the linkers to URLs ranking for your terms). The second stage is when you begin creating and distributing highly linkable content that targets the most important linkers within your keyword space, while continuing to monitor for emerging link opportunities.

A URL’s linkability primarily exists in comparison to its competing URLs – those URLs with a demonstrated ability to rank. You determine your URLs’ competing URLs based on the pages ranking 1-10 (or 1-20, 1-30, 1-100 etc…) for the terms you want your URL to rank for. We contend that you can extract meaningful, actionable linkability measurements based on comparisons of these ranking pages, and by comparing the pages that link directly to them. Note that linkability’s key metrics will shift from keyword to keyword, industry to industry, even between geographic locations. This means that general “linkability guidelines” may not help you to home in on what truly impacts linkability for your keywords.

Finally, it may not be the inbound links to a ranking URL that contribute the most to its rankings.

>> Preparing for Linkability Assessment
Begin by selecting the URLs on your site that you want to have higher rankings. These pages should be your most valuable pages – the pages that have consistently contributed to your revenues. Most valuable URLs often include pages such as paid search landing pages, pages that convert visitors into prospects or customers, pages that rank on the second or third page of search engines for your target terms, pages that answer common community questions, pages that already have links and referral traffic, etc… This article goes deeper into choosing which URLs to build links to.

Once you have your list of target URLs, establish the target 3-6(ish) keywords for each one. These URLs and keyword groupings become your reference points for all the remaining measurements and comparisons. Remember – don’t try to establish the linkability of your entire site. It’s only important (especially at first) to look at the linkability of the URLs that could contribute the most value to your organization if they had higher rankings.

We’ve written extensively on link prospecting here >>

>> Subjective Linkability Metrics: By-Hand Analysis
Your most important tool for measuring a URL’s linkability comes from Yahoo – the per-page inbound link count. SEOBook’s SEO Toolbar and SEO for Firefox best present this data and make it easily exportable. Though we lean as much as possible towards automated methods of analysis, there always comes a time when you have to put your eyeballs to the pixels and analyze things yourself. Remember, in all of this you’re looking for patterns amongst ranking pages similar to yours that have earned inbound links.

1) Look and Feel
Do your competing URLs with inbound links have a consistent or particular look and feel? Some markets favor dingy, dated layouts and design – this indicates that the site has a history and that the site owners are not overly-concerned with impressing their visitors. Other markets see design that’s a year old and instantly click away. People who choose to link into the pages you’re competing with are an important part of your marketplace. If inbound linkers clearly favor a particular look and feel then consider making some adjustments.

2) Content Structure and Organization
Is your content structured for easy consumption? Do you notice any structural trends on the pages that have earned the most inbound links? H1 tags, short paragraphs, pull quotes – these types of structural enhancements, so long as they serve the viewer – may impact linkability in your space.

3) Authority of Content
Do your competing URLs contain clear demonstrations of authority? This could be outlinks to related content, quotes from experts (including site owner), badges/awards that show industry participation, a client list and more… See if the highly-linked competing URLs, in aggregate, make it clear to visitors that the page’s creator has authoritative knowledge.

4) Depth and Thoroughness of Content
This is more than word count – how completely does the copy on the page discuss the topic? Are there multiple bullet points and an almost laborious thoroughness that ensures that no one leaves the page uneducated? If the ranking pages your URL competes against look more like Wikipedia pages than sales pages you should consider revising and possibly expanding your content.

5) Existence/Quality of Conversation
Do your competing URLs contain conversation threads, customer reviews or even a rating system? This amount or even the tone or quality of conversation on your target URL could affect your page’s linkability.

>> Seeking Inbound Link Trends and Patterns
Are there trends within the patterns of inbound links? Here are a number of items to investigate that could shed some light into why certain pages have more linkability than others.

1) Links From Particular Site Types
Perhaps a particular competing URL has earned several links from forums… If your marketplace includes a large number of active forums then it’s time for you to understand why forum members choose to link to some URLs and not others. Maybe a competing URL has a number of links from FaceBook or Twitter… or even Wikipedia. Understanding what made this URL attractive to participants at these sites will help you to improve your URL’s linkability. Perhaps you’ll find that a particular shopping site links directly to competing URLs – it may help your rankings to provide this site with a feed.

2) Inbound Link Text Patterns
Are there patterns within the link text to your competing URLs? If so, does the link text match how you describe the products or services on your page? Perhaps there’s a segment of potential linkers who don’t feel “targeted” by your URL’s copy because you’re not speaking their language.

3) Most Valuable Link Pages Pointing to Small Cluster of URLs
Some link prospect pages provide more value than others. You can identify these Most Valuable Links because they come from pages with high PageRank, high inbound link count, high traffic values, and high organic rankings of their own. If the most valuable linking pages target a small cluster of your competing URLs, it’s up to you to understand what these competing pages did to earn those important links.

4) Context Framing Inbound Link to the Competing URL
How does the inlinking page describe the link? What is the surrounding link text? If there are any adjectives, these may provide clues regarding linkability. The title of the page may also provide some insight into why your competing URL received a link.

>> Objective, Large-Scale Linkability Metrics: Machine Analysis
Here are a number of objective – i.e. machine-readable – metrics to help determine possible factors that impact a URL’s linkability within a given set of inbound links. In all cases below we’re looking for trends amongst the competing URLs that have inbound links (not overall domain links, just page links).

1) Target Keyword Density of Competing URLs
Is there any relationship between keyword density and whether or not it earns links? While it’s long been established that keyword density has little if anything to do with relevance, by comparing the keyword density of your top 20 competing URLs that have links you may uncover some opportunities for improvement… especially in title tags and H1 tags, which aid visitors by making clear declarations of a page’s subject. Further, it could be that overly-dense pages receive fewer links because they are “over-optimized…” it may be that you should ratchet back your keyword usage and focus more on the visitor.

2) Number of Words on the Page
It may be that the URLs that you’re competing with have more words on the page than yours. And then again possibly they have less. If there’s a trend – one way or the other – for the competing pages with links then you might want to add or reduce the amount of valuable information on the page. If you look across the top 30 URLs for 5 closely-related target keywords, the number of words on competing pages could become a meaningful linkability metric.

3) Embedded Media on the Page
Is there a linkability trend that favors images, video, podcasts or other embedded media? For some keywords, linking sites could favor those with more extensive, non-textual content. If this is the case for the competing URLs that earned links you should consider making changes to your target URLs.

4) Type of Site/Type of Page
Is the competing URL part of a social media site? Is it a blog post from a competitor, or even a press release? If you find that inbound linkers favor certain types of sites or types of pages for a given keyword group then you might consider attacking these keywords with different content.

5) Usage of Salesy, Purchase Inducing Words
If you brainstorm out a list of sales-related terms you can cross check the text of ranking pages to see how tolerant linkers are towards being pitched. This can be a quick test to see if you should target a keyword group with product/service sales copy or informational, how-to copy.

6) Length of Sentences, Length of Words, Flesch-Kincaid Grade Level
Do inbound linkers seem to have a preference for brevity? If so, you may find that the copy on your target URL is too loquacious or even pedantic for your linking audience. Then again, maybe you’re too concise. Looking at averages could shed some light on what linkers in this particular keyword space tend to prefer.

>> Linkability Analysis Tools
Keyword Density Analyzer Tool
KEYWORD DENSITY & PROMINENCE 2.5
Word Count Tool
Writing Sample Analyzer
SEOBook’s SEO Toolbar
SEO for Firefox

>> More Linkability Resources
Linkability – Why do some sites have it while others don’t?
Linking Strategy Part II: Maximising your Linkability
A Site without Linkability is a Site Destined for Failure
Link Ability – The Life Blood of A Website