The rate at which a website gains or loses links during a specified period.
Link velocity describes how quickly observed links are gained or lost over a chosen period. A report might count individual backlinks, distinct referring domains or net change. Those measures are not interchangeable, so the unit and date range should be stated before anyone interprets a graph.
Tool discovery is another complication. A link can exist before a crawler notices it, and a provider may change its coverage or processing. An apparent spike can therefore reflect new observations rather than every link being created on the same day. Inspect the sources and timestamps available instead of treating the chart as a complete publication history.
The rate alone does not establish whether links are legitimate. A genuinely newsworthy event can attract attention quickly, while a slow trickle of arranged placements can still be manipulative. There is no need to turn the term into an invented safe daily quota. Evaluate the reason for the links and the actual pattern behind the numbers.
Takeaway: Use changes in link counts as a prompt to investigate. Do not buy a deliberately paced link package on the assumption that gradual acquisition automatically makes it safe or useful.
Example
A food producer publishes an original recall-tracking resource during an industry event and several relevant publications cite it in a short period. The business records the coverage and checks the destinations rather than assuming the speed of attention is itself a problem.
What to check
When a report changes sharply, compare its counting method, data source and observation dates. Separate new references from repeated sitewide links or rediscovered pages. If you suspect manipulation, inspect the placements and agreements rather than relying on the shape of the graph.
For more detail, see Google link spam policy.