This read-only Counter32 tallies, per its source description, the number of route changes RIP has made to the IP route database within this routing domain, explicitly excluding simple age refreshes of an existing route. Admins watch this counter for unusual spikes that would indicate route flapping or an unstable topology being propagated via RIP. For example, a sudden surge in RouteChanges after a link failure elsewhere in the network would confirm RIP is actively recalculating and installing new routes in response.