We launch the website https://www.iradesign.io and sent a weekly newsletter update to a couple of thousands of Creative Tim's developers. On the first day, there were around 75 people that checked IRA Design.
After that silent launch, we started to add some blog posts on our website about this kind of illustration and why there were trending at that point in time.
The most important thing that we did in the launch was that we used the illustrations from IRA Design in one of our Design Systems: Argon Design System (https://www.creative-tim.com/product/argon-design-system). That was sending a steady number of people.
We switched from 75 people/day to 2-300 people in a couple of days.