The Refresh service is used to reload the page. This service mimics the reload functionality in a browser. This service accepts no input and only outputs info on when the service was run and duration.
This can be useful when we wish to reload the page in order to refresh webparts, but want to maintain the existing query strings. We could choose to reload only the portions of the page that need to be refreshed (datasources and onloads), but if there are very many and the developer doesn’t wish to target them all directly, this can be a simpler approach, though it will rerun all datasources and onload processes, so it could cause longer load times.