While link velocity is an easy concept for web site owners to understand, it is important to know how to monitor it properly or there could be a negative impact on your site rankings.
Link velocity is simply the rate at which backlinks are built to a web site. If a site contains good quality, useful content, links from other sites would naturally occur randomly and on a fairly steady basis. Some articles would attract more links than others.
All major search engines collect every link that they find that points to a web page and thus are aware of patterns that could be a sign of artificial attempts to boost the rankings. Link buying and obvious attempts to boost the rankings for a site through artificial link building are a violation of search engine guidelines and can sometimes result in penalties that reduce the rankings for a page. That is the opposite of what link building attempts to accomplish.
Backlinks are critically important to the rankings for a web site. A link to a site is a popularity vote, but with some search engines, such as Google, the quality of a backlink also matters. Search engines expect a site owner to build some link to their sites, but the pattern of link building, as well as the quality of links, is what determines the success or failure of a link-building program.
Problems can occur when search engines suddenly detect thousands of low-quality links, such as those from the poor quality directories that are typically sold in groups of hundreds or thousands. We always ignore those offers because we have never seen any positive impact from that type of link-building.
The best advice that can be offered regarding link building is to focus on building quality links and do it on a continual basis. If a site has not received any new backlinks for a while, the link building process should start out gradually, rather than tossing thousands of links at a site all at one time. A few good links from related web sites are worth far more than hundreds or thousands of poor quality links.
To sum things up, link velocity is the rate at which links to a site are accumulated. It is never a good idea for a site to have a link velocity of zero. It is also not a good idea to suddenly accumulate thousands of poor-quality links. A sudden change in link velocity may cause a site to be scrutinized further and in some cases the red flags that are raised can be detrimental to the site’s rankings.