Use Referral Trackers to generate impressions and monitor referrals. HubPages is all about interacting with the Internet community, and there's no better way to spread the HubLove than through links to HubPages. Every time you place a link to someone's HubPage in an email, forum post, or website, you'll receive a share of the impressions the Hub generates.
To keep tabs on these referrals, you'll need to attach a Referral Tracker to your links. The default tracker is all that's required, but you can create up to twenty independent trackers — each with a unique name and descriptions — to help you determine the best linking strategies.