Affiliate links can look pretty ugly to the regular eye. Sometimes you don’t want people to be able to see those long jumbles of letters and numbers that create your affiliate link. It helps to have a good looking link that is more presentable to the web visitor. So instead of seeing something like this http://7296e81vndoi76-ypmgtbyfn2y.hop.clickbank.net/, you can instead have a link that looks like this http://homebusinesscash.info/youtubeinfo.
There are a number of different ways to change your affiliate links. One simple way is to use a url shortener. This can be bitly or tinyurl. They are both good services, but bitly can sometimes put up nasty messages about affiliate links. Tinyurl seems to be more affiliate friendly. The upside of using bitly is that they have a really good interface. You can go to the site and see the url links that you have created in the past. With tinyury, I don’t think there is a way to manage your shortened links. When you create a link, you should copy it into a text file and save it someplace on your computer.
Long affiliate links can be also be masked with a domain name. This can cost you some money, but you can have a dot com or other top level domain extension to give your link even more credibility. This could get pretty costly if you are doing this for a lot of affiliate offers.
Cloaking your affiliate links gives them a better look. Your visitors will still end up in the same place but it is all about presentation. Think about driving a old beat up jalopy or a mercedes s550 to a destination. They both get you there, but one just looks better.