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Thursday, 23 February 2012

Top 30 SEO Link Authority Websites Worldwide

At the heart of SEO is the fact that search engines use the quantity, context and quality of links pointing to a web page when ranking it for a keyword. This helps them determine how important the site is and what it's about.

Since links are so important, it's interesting to analyse which websites have the most links. It's particularly interesting to compare link authority data with our perceptions about which sites are more popular, important on the web.

Below is a table ranking the global top 30 websites according to the number of inbound links they have - particularly those with the greatest number of separate domains linking to them.

Theoretically these should have the highest basic SEO authority in the world. On-page content, social media signals and many other factors also affect rankings. But as the world's leading authority sites it's reasonable to expect that the sites at the top of the list should be able to rank in Google for just about anything.

Did you know that Twitter - not Google - has the highest link authority site on the web?

Some of this data might surprise you...


Domain

Linking domains

Overall Links

Description

Twitter.com

1,350,000

116,890,000

Microblogging platform and the world's second most popular social network. Many sites link to their Twitter feed

Google.com

872,000

47,620,000

Google's main homepage

Yahoo.com

452,000

23,280,000

Was the biggest search engine before Google's dominance. Now merging with Bing

Baidu.com

308,000

16,750,000

China's top search engine - China has the world's largest population (more than 4 times more people than USA)

Wordpress.com

211,000

14,340,000

The most popular blogging platform

Blogger.com

210,000

7,280,000

Google's blogging platform

Amazon.com

207,000

5,430,000

Online retailer that began life selling books

Youtube.com

204,000

5,960,000

The most popular video-sharing social network - owned by Google

Bing.com

150,000

3,190,000

Microsoft's search engine and rival to Google

Adobe.com

132,000

4,420,000

Provides Flash for online video and reader software for PDF documents - both are popular and frequently linked to.

Taobao.com

108,000

3,140,000

A leading consumer-to-consumer marketplace

Microsoft.com

102,000

1,679,000

Microsoft global homepage

sina.com.cn

97,081

3,580,000

China's leading web analytics provider

Linkedin.com

88,349

2,720,000

The leading professional networking website

Sohu.com

87,309

3,270,000

Chinese search engine

CNN.com

85,057

2,580,000

The leading global news provider (US-based)

Ebay.com

83,948

2,130,000

The world's most popular auction site (peer-to-peer)

PayPal.com

83,886

2,760,000

The world's most popular peer-to-peer payment system. Websites using PayPal often link to the site

163.com

81,974

3,340,000

Leading Chinese web portal

Apple.com

76,271

1,220,000

Apple homepage

Facebook.com

75,988

2,040,000

Homepage of one of the world's most popular social networking sites

Wikipedia.org

74,819

1,700,000

User-edited (wiki) encyclopedia

Yahoo.co.jp

74,434

2,750,000

Yahoo's Japan homepage

Tumblr.com

63,302

4,390,000

A leading blogging platform

Qq.com

62,995

2,280,000

China's biggest web portal

Google.co.jp

62,483

3,300,000

Google's Japan homepage

Msn.com

58,029

1,520,000

Microsoft Network homepage - used to be the default homepage for Windows computers

Google.de

53,443

1,120,000

Google Germany

BBC.co.uk

46,182

1,100,000

Leading provider of news, entertainment and information - ad free - to the UK and the world. Funded by UK TV owners

Imdb.com

45,887

1,320,000

Movie database


Domains are listed in strict order of authority - with the highest authority sites at the top. Authority is based primarily on the number of linking domains. 10 links from 10 domains typically represent more SEO value than 10 links all from the same domain.

Perhaps most interesting of all is that based on this data Twitter is the most authoritative site on the web. Perhaps this is in part because many businesses and individuals link to their Twitter feed from their website.

Of course SEO is about much more than just links and domain authority - but link-based metrics are among the most important SEO factors and they do tend to correlate well with rankings. Based on the enormity of Twitter's link authority alone, pages on the Twitter.com domain might be expected to rank far better in Google than they actually do, for a wide range of terms. Do tweets simply not represent enough content to rank well? That seems likely and might explain why Wikipedia tends to rank far better than Twitter. (Could Google actually be suppressing Twitter URLs? I've seen other anecdotal evidence that this may indeed be the case and it may be worthy of further research).


Yahoo!
Yahoo! comes third - way ahead of Bing and Facebook - which is also something of a surprise at first. But it's a much older domain. It's been a major part of the web for much longer and at for quite some time was the most popular site on the web.

Baidu

Baidu coming fourth in the link popularity chart is a reminder that China is the next global superpower - soon to overtake the USA to become the world's richest and most economically active nation. If China is emerging as the most important country in the world then Baidu is also becoming the most important search engine in a global context. It's the fourth highest authority in the world according to this data, and I expect it to rise to the top of the list by 2015.

1 comment:

Latoya said...

Hey!
I'm working on the SEO for my website, so is my best bet to try and get a link to my website from those in your list?

I still dont get the whole root linking domain thing, what a headache!