What does it mean that workflow iteration?

After each execution look for one thing to improve in the workflow.

Example: You write a weekly status report every Friday. It takes 45 minutes. After this week's execution, you notice that 15 of those minutes go to hunting down project links scattered across Slack, email, and your task board. One change: you create a running doc where you drop links throughout the week. Next Friday the report takes 30 minutes. You didn't redesign the workflow. You changed one thing, measured the result, and kept going.

Try this: Pick a workflow you executed this week — a meeting you ran, a document you produced, a deployment you shipped. Write down three sentences: what the workflow is, how long it took, and one specific friction point you noticed. Now write one change you will make next time to address that friction. Do not write two changes. One. Execute the workflow next time with that single change, and observe whether the friction decreased.