Twelve years ago, pre-Gooogle, search engines just analyzed content in order to rank sites, says Ian. Linking wasn’t part of the ranking algorithm. Google put paid to that by making links part of the equation. Suddenly, SEO became a lot more difficult.
Ian explained Term Vector Analysis (TVA) and Citation Analysis and how they influenced the concept of links. TVA is how keywords appear on a page (relevance). Citation Analysis is the influence of keywords on a page (authority). Google was built by students who were using citation analysis on a daily basis. Keyword density isn’t used by search engines. However, it is kinda similar to term vector analysis, which IS used by search engines.
Every web page stored in Google has a term profile containing number of times a keyword is used, density, proximity, position etc. Google then looks for clusters of terms that appear in proximity to the search phrase and finds the Representative Average to display in the SERPs. The process of TVA is excellent at figuring out informational pages such as Wikipedia pages.
The problem is that TVA can’t give search engines the entire picture - it’s difficult for them to tell the difference between spam and awesomeness. This is how search engines worked up until Google. Then Google came along and threw links into the equation. The more links you had to the page, the higher rank you would have in the SERPs.
Typically, the better writing, the worse the SEO, because good writers use flowery, descriptive language.
Types of Links
Now, to rank, you need three kinds of links:
1) Authority (aged)
2) Relevance (current)
3) Buzz (social)
So you need a combination of old and new links. Therefore you need to be constantly building links!
Stinking Linking - reference to articles by Mike Grehan about the prob with aged domains and links.
Link page quality is measured by:
- PageRank of the page
- number of other links on page
Remember that it’s the PR of the PAGE that’s important, not the PR of the domain or main site. So if someone is offering you a link and bragging about having a PR4 on their home page, but your link is going to go on a inner page that has PR0, there’s no value there.
Page sculpting is not as influential now. No point no-following all your links on a page as they all leak PR anyway.
Sources of Links:
- Seeds - Yahoo, DMOZ
- Directories and connections
- competitors (meet then beat)
- articles and blog posts
- case studies
- contests and publicity
- social media
- internal linking campaign
- link reclamation
- pick up the phone!
Ian suggests starting any link campaign with your own site. Make sure you are cross linking internal pages. Then go and do link reclamation - check your 404s in Webmaster Tools to see if anyone is linking in to pages that no longer exist and ask them to update.
As an idea to attract links, Ian suggests holding a contest e.g. school laptop giveaway - put the rules of the contest on your web site and then the school / parents etc link to your web page for the rules.
Anchor text is virtual content. Rule of thumb is, if you wouldn’t spam your web site with the same keyword phrase, don’t do the same with your link building. Mix and match the anchor text linking to your pages and ask people linking to you to do the same.
Deep links are the best links. Don’t ask everyone to link to your home page! You’ll get better crawls and better rankings and your audience gets a higher quality experience if you inner pages are well-linked. Plus the crawler starts at inner pages that it might have missed before.
Tools for Link Building:
- Use Free For All (FFA) links
- Off topic links
- Obviously purchased links