This read-only Counter32 counts, for most neighbor sources, how many times a path has actually been used to forward a message, or for a manualRoute entry, how many static routes use that neighbor as their first hop. An admin checks this to see whether a configured neighbor path is actually carrying traffic or sitting idle. A manualRoute neighbor entry with a uses count matching the number of static routes configured through it confirms all of those static routes are correctly pointing at that neighbor.