When you want to import brushes into Illustrator, you first need to create a new file called " Brushes.ai “. This file contains all of the brush data for your project. Next, open the Brushes.ai file and click on the " Import Brushes” button. In the resulting window, select the brushes you want to import and click on the " Import" button. Once the brush data has been imported, you can use it in your project by right-clicking on it and selecting " Use as Default “.