As an affiliate, you may want to customize and/or personalize the Referral URL.  Creating an alias allows you (the affiliate) this ability.  First, click on the Aliases tab within your portal (You can also click here)

From here, you can create any alias that you would like by adding the new alias in the box and then clicking on "Add Alias".  You can choose the new alias to be your Default for the referral link.  The referral link will automatically be added.

Next, you would access the new customized referral link by clicking on your Referral URLs tab. (You can also click here)

Now you can share the link with the new customized alias!  You can easily share by clicking on the Facebook or Twitter tab.  Instagram allows you to post links in your bio. (Referral Links in Instagram)