You focus on the result, not the product itself. Instead of trying to explain what it is, you write about what problem it solves or what the customer gets from it. People search because they have a need, so your ad should speak to that need directly. A good headline might say something like "Stop losing money on X" or "Get results in 30 days." The explanation can happen on the landing page. So what do you think matters more in a search ad, describing the product or describing the benefit?