Make the argument
Much of what we write in our work makes a case for doing something.
Within the APS, we ask for funding, people, time and authority. When we write for people outside the APS, we want them to take action: get a health check, vote or be alert to cybersecurity threats.
In both cases, we are making a persuasive argument for someone to do something.
A good persuasive argument has 3 parts. Each part has a different role, so you need all 3: