What does it mean that the default option framework?

Define good defaults so that the do-nothing option is acceptable.

Example: Your team's deployment pipeline requires six manual approval steps before code ships. Most developers skip two or three of them under deadline pressure, introducing inconsistency. You redesign the pipeline so the default path — doing nothing special — runs all six checks automatically. Developers who need to skip a check must explicitly opt out. Deployments become safer not because people got more disciplined, but because the do-nothing path became the safe path.

Try this: Identify one recurring decision in your work or life where you regularly make the same choice. Write down: (1) the current default — what happens if you do nothing, (2) the choice you actually want to make most of the time, and (3) how you could restructure the environment so that your preferred choice becomes the default. Implement the change this week and observe whether you still end up at the same outcome with less friction.