Are you familiar with the term, ‘Unique Selling Point‘? If no, then refer to the Wikipedia entry.
There is no need to tell the importance of Unique Selling Point (USP). It’s want which differentiate your product from other and gives a strong reason to try it. USP is important everywhere.
So, whenever you are going to start a Marketing Campaign, focus on Unique Selling Point. The USP must be in your punch line, in your ads or in your landing page.
The more you will focus on it, the much you will get in return. Always find a unique and best way to showcase your USP.
Clickinc, An Affiliate Program Software, does the great job here. Whenever you perform a search related to the site and then navigate to the site via SERP, you will find something like this.
‘Trulinks‘ is the unique feature provided by Clickinc. An Affiliate can directly link to the merchant site without any affiliate identity and even gets compensation if sales occur. So, that’s why they are promoting their USP ‘Trulink’ in this unique way. Impressive, isn’t it?
So, the summary is “Focus on USP every time for more sales”. Like, my USP is I am very fast and I charge less than other for SEO, WordPress and Internet Marketing related projects. 
Thanks
Ankit
