Link velocity is the rate of gaining inbound links on a day to day basis. Link velocity is the speed at which a website generate or receive back links. ubitestechnologies.Link velocity is essentially the rate at which a site is gaining inbound links on day to day basis.For anyone on an aggressive link building campaign,you eventually saturate your potential links.If we build an excessive amount of back-links in short period of time,then there may be a chance of Google penalization.