SEO Linking Tips and Video

We know from test and experience that different links pass much different values for SEO purposes. Sometimes you build links that immediately improve your rankings, while other links do nothing to alter your position. The value of a link varies according to different factors, including:

Internal vs. External Links and most importantly Authority and Trust of the Linking Domain. Other factors include the position of the link on the page and alt attributes vs. text links. These are just a few.

What happens when you build new links on old pages?