Measuring Green Blogging Influence

Bloggers are emerging as key influencers online.  Today, many blogging sites effectively compete with traditional news sources for breaking stories and eyeballs.  Moreover, many consumers trust bloggers more that established news organizations simply because they are unaffiliated.  Green bloggers are no different.  In fact, many green bloggers have built a loyal viewership that gives mainstream news sites a run for their money

Today’s announcement that Discovery Communications was acquiring TreeHugger, the top ranked green blog, reinforces the role that blogs now play in reaching and influencing online consumers. Nonetheless, measuring this influence is an imperfect science. 

In an ideal world, influence would be measured by determining the number of people exposed and the incremental impact of that exposure on key metrics like awareness, favorability and purchase.  Surveys and panels can be used to capture self-reported data pre- and post-exposure to determine lift in key metrics.  Yet, this level of precision is impractical, too costly or, simply, not feasible to implement for most sites.  As such, proxies are required to approximate influence.

One simple proxy is site traffic – either total visits or unique visitors to a website.  Several sources track blog traffic including Compete, Technorati and the blog Truth Laid Bear.  Truth Laid Bear tracks and ranks the top 5,000 blogs based on a 45-day moving average of daily visits.  The site casts a wide net by considering corporate blogs including dozens and dozens of blogs sponsored by sports teams.  

According to this Truth Laid Bear, five green blogs are ranked in the top 500 based on daily visits as follows:

Overall Rank

Blog

Daily Visits

169

TreeHugger

70,783

321

AutoblogGreen

15,500

340

Inhabitat

12,976

341

The Oil Drum

12,861

451

WorldChanging

5,974

 

Technorati also tracks “popular” blogs but it ranks them based on the number of its members that made the blog a “favorite”, rather than using a more objective site traffic metric.  In this ranking, TreeHugger is ranked 70 based on having had 293 Technorati members made the blog one of their favorites.

Compete provides a snapshot of unique monthly visitors (“People Count”) over the past 13 month period.  If we graph the top five green blogs, we see that there has been a significant increase in unique visitors on several of the top green blogs this year, and especially on TreeHugger where traffic peak in April at almost twice its 2006 average.

    

Yet, when evaluating blog influence, site traffic metrics do not tell a complete story.  Specifically, links to the blog’s content from other sites should also be considered as a significant proxy for influence.  Not only do links provide a de facto endorsement of the content; they also provide a valuable proxy for the readership of repurposed content on other sites.

Technorati and Google provide tools to quickly determine the number of links to a site.  Technorati ranks the top 100 blogs based on unique links during the past six months. (TreeHugger is ranked #21 – the only green blog on the list).  Google provides the ability to determine links for a blog like TreeHugger simply by typing “link: www.TreeHugger.com” on the site.   

treehugger-link.gif 

Leveraging Google, Marketing Green determined links for the top five sites ranked by the Truth Laid Bear (TLB) blog as follows:

 

Overall Rank (Daily Visits)

Blog

Daily Visits (TLB)

Links (Google)

169

TreeHugger

70,783

364,000

321

AutoblogGreen

15,500

103,000

340

Inhabitat

12,976

61,800

341

The Oil Drum

12,861

23,400

451

WorldChanging

5,974

28,800

 

Yet, “link” metrics provided by Technorati and Google are still incomplete proxies for online influence.  In the case of Google, links are determined in total and do not take into consideration recency.  Moreover, neither Google nor Technorati have the ability to translate links into the actual number of incremental visitors that view the content on the linked site. 

 

Additionally, links reported only account for sites that are directly connected to the original content (one degree away).  In many cases, however, blog posts are repurposed across multiple sites, resulting in a story that links two or three or more degrees away from the original site.  This network effect greatly enhances a blog’s influence in market simply by the fact that it reaches so many more people.

 

A 2nd degree network effect is fairly easy to demonstrate.  Here is an example from Marketing Green:

 

Zero Degrees: On February 19, 2007, Marketing Green posted a blog entitled “Green Marketing Leverages Social Networking on MySpace”.

 

First Degree: On February 20, the Marketing Strategy & Innovations blog distributes Marketing Green’s social marketing posting and provides a link back to the original story.

 

Second Degree: On February 27, Marketing Vox wrote a story entitled “Cause Marketers have Headstart on Social Networks” linking to the blog posted on the Marketing Strategy and Innovations blog, but not to the original story on Marketing Green.   As such, any measurement of influence using links to Marketing Green as a proxy would not, however, account for content posted on Marketing Vox in this case.  As a result, links would underrepresent the true distribution of the content online.

Thus, measuring the influence of green blogs online is an imperfect science.  Useful proxies are available that track site traffic and links from other sites.  Green marketers should be aware that these proxies likely undercount the true impact online as they do not track content viewership on the linked sites or the number of links that are more than one degree away from the original site.

 

Nonetheless, the learning is clear for green marketers: content distribution increases influence online by increasing the number of exposed people.  Creating content in a format that can be easily distributed or repurposed can result in an increase in the number of links to the site and expand a blog’s influence online.

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22 Responses to Measuring Green Blogging Influence

  1. Preston says:

    Excellent, thorough article on some brand-spanking new news.

  2. Davis says:

    You know, you can also get the t-rati numbers from this link (switching each blog’s URL out).

    http://technorati.com/blogs/theoildrum.com?reactions

    TH:
    Authority: 8,778
    Rank: 17

    WC:
    Authority: 2,818
    Rank: 238

    IH
    Authority: 2,631
    Rank: 285

    TOD:
    Authority: 1,157
    Rank: 1,776

    ABG:
    Authority: 102
    Rank: 52,069

    I am not sure how The Oil Drum gets all of those hits without being linked to. Pretty amazing traffic numbers with that few links.

  3. David says:

    Really interesting post David. Thanks

  4. the green blogging influence is growing up so fast!
    really interesting post!

  5. I agree, the blog is the potential “green giant” so to speak. thanks for the post. You might also review my thoughts on the honestly of the current advertising Green focus. See what you think. http://generousmarketing.typepad.com/junctiongen/

  6. Interesting. I think blogs will be 10x more popular in 5 years but it seems that more and more mainstream news groups are buying and starting blogs now.

    R

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