In this section, we will explore the organization of the Toolbox and establish a common language for describing its various components. Until this point, we haven't actually seen the interface itself. We've merely configured and possibly installed the required dependencies to make the Toolbox function. To view the Toolbox, you need to click on Toolbox under the Processing menu, as illustrated in this screenshot:
The Processing Toolbox will appear on the right-hand side of the QGIS interface:
The next section will provide you with an overview of how to run an algorithm in this Toolbox.