I recently went shopping and encountered a surprising sales style. The salesperson was knowledgeable, but he didn’t seem to care if I bought the product I was interested in. He wasn’t pushy or even trying to close the deal. He merely suggested I test out the product. I did, and I was impressed. A few days later, I bought it. Afterward, I asked the salesperson why he was indifferent to my purchasing decision. He said the product is so great that it sells itself and that if I didn’t buy it, someone else would—he sees a constant flow of people who are ready to buy.

This company has done a great job of understanding the pains of their customer and creating a product that solves them magnificently. Potential customers test the product, immediately see the value it creates, and are ready to pay for that value. The salesperson is there to answer questions, but the product itself is doing all the selling.

Lots of early founders want to focus on sales and marketing after they launch their product. They believe that’s the key to growth. Both functions are important to any business. But in the early days, founders should be laser focused on their product as the key to growth. An amazingly good sales and marketing strategy is to make a product so wonderful that people easily understand the value it creates for them. Happy customers spread the word to others. When those folks try it, they’ll love it and buy it, and they’ll spread the word.

If you’re an early founder concerned about sales and market, ask yourself: Is your product good enough to market and sell itself?