A lot the material about social networks is familiar from Malcolm Gladwell’s “Tipping Point”. While Malcolm looks at the sociological aspects, I didn’t fully realise the mathematical systems underlying social networks ie. Scale-free networks Concepts like Dunbar’s number (the number of people we can maintain a first name relationship with) are also grouped under the [...]

How important are links to your Google ranking?
The short answer is that they are VERY important.
Experts in the SEO industry put the value of combined links and domain history at about 50% of your capacity to rank.
The long answer is that they are very important but have to be done right. Mass linking will get [...]