HubKarma is a score that reflects the degree to which you link to others' Hubs and to Topic pages in your own Hubs. Hubs that point to other relevant, high quality Hubs enhance readers' experience on HubPages and improve HubPages credibility as a trusted resource. HubKarma has some influence on your Hubber Score and is on a 0-100 scale. The link suggestion tool makes linking to other Hubs and Topic pages easier.
The answer to most questions can be answered here: