The short answer
Underneath the marketing it is four measured steps: a visitor becomes a signup, a signup reaches the moment the product is obviously useful, that user starts inviting or depending on the product, and only then does money or a salesperson enter. Great teams instrument every one of those steps and know their own numbers against the benchmarks (free to paid averages around nine percent, freemium converts visitors to signups at roughly twice the rate of free trials, and adding a product qualified lead definition lifts conversion dramatically). The second thing inside a great motion is a deliberate answer to when a human gets involved, defined by product usage rather than by company size, so sales calls people who are already succeeding rather than cold. The third is that the free experience is a real product, not a crippled demo, because the whole model rests on someone getting value before they talk to you. If you cannot name your activation moment and the percentage of signups that reach it, you do not have a self-serve motion yet, you have a signup form.