The number of links appeared on a page often represents the quality of its link regardless of internal or external links. Matt Cutts have cleared that in a post few months ago under title pagerank sculpting. It is advices to allow pagerank juice to flow among internal pages. This means, it is good to give dofollow link to all our internal pages including tags, categories, blogposts, etc. It allows your page rank flows internally well enough that enables your internal pages to attain some pagerank value. I have seen blogs that completely gives nofollow links to all its internal pages. Internal pages should not have rel=”nofollow” tag added. Pagerank passes value to your internal pages that will help in SERP ranking. I couldn’t stress that enough about internal page with dofollow.
When it comes to external links, it is advisable to use rel=”nofollow” tag more often on links that we think is not important. Example of links that is advised to use nofollow tags are comment links, advertiser’s link, Rss link, and other unrelated links. Whether it is dofollow or nofollow, pagerank juice is still assigned to that particular link. If the link uses nofollow, the juice will just flushed away. It does not add more value towards dofollow links (both internal and external). This means, pagerank juice for that particular page are equally divided among all external links and another portion are equally divided to internal links.
Let’s see below example:
- *PR5 page have 5000 juice points
- This page have 80 internal links (0 internal nofollow links) and 80 external links with (70 external nofollow links)
- *Let’s assume Google allocate all PR juice evenly to internal and external links.
- Now, each link will get 5000 / (80+80) = 31.25points
- Flushing nofollow points (70 nofollow links x 31.25 = 2257 points)
- Your internal and external link will only get 31.25 points where you have flushed away almost half your PR juice on that particular page.
Let’s take another example:
- *PR5 page have 5000 juice points
- This page have 20 internal links (0 internal nofollow links) and 20 external links with (0 external nofollow links)
- Now, each link will get 5000 / (20+20) = 125points
- Getting a dofollow link from your page will contribute 125 PR juice points
*Above calculation is based on assumption. The real calculation could be much complicated.
Overall summary; Lower number of links on the page will add more value to the link. If you are an advertiser or link builder, I am sure you will hunt for low number of links per page. This is just another tips for you to get more advertisers on your blog. Controlling internal and outgoing links per page will add link value and this can attract more advertisers to your blog.
You can install SEOQuake plugin to your Firefox to check all internal, external (dofollow and nofollow).
That’s why i dofollow all of my internal linking. I already aware that PR juice will flow to all page that linking in.
Excellent. I have seen some blogs that have nofollow attribute to all their internal links. Hope the developers start to create more SEO friendly templates.
Good explanation. Matt Cutts explained it in a video but it’s still difficult for me to figure out how much juice each site will provide.
He never revealed the real calculation of how much page rank juice each link for internal or external will receive.