Built to be recommended

When someone recommends us a product, we usually skip different options. Our decision making process is biased with that recommendation. No matter how many good options you have–in the end you’ll end up choosing that one.
That bias is so strong that the likelihood to pick that product increases dramatically, even though its specs are not superior to other products.
That influence is what makes a difference in the market. Smart companies know this, so they try to push you to recommend them through incentives.
But that’s only a promotion strategy. Here I’m talking about an ingrained recommendation into product. 
That’s what you should look for.
Build products that are easy to share and recommend. Because in the end, the final decision your customer has will be influenced by that recommendation.