Link Velocity...

[Jeffreyhooft]

Link Velocity is basically the rate at which a site is gaining inbound links on a day to day basis. For anyone on an aggressive link building campaign, you ultimately saturate your probable links.

[braketech]

Link velocity is the speed at which a website generates or receives backlinks. Velocity technique is an organic link building technique.

[GladysTap]

Link velocity is the rate at which others are linking back to your site.