Once the design is made the file then need to be sent to a Slicing software where it gets ready for the printer. The models that are designed have to be converted into a series of code called G-Code for the printer to recognize it and start printing. This part is called Slicing. The quality of the print depends on the settings that are made here.
The most used software is Cura. This software was mainly created for the printer called Ultimaker. But since it was made free and open source most of the printers out there have started using Cura. In this software the print settings are sent just like we do for our laser printer. Here we can Scale, align, and orient our print model. Other crucial settings like the temperature, retraction speed, flow of the filament nozzle diameter etc are fed to the printer using this Software.
Sources:
[1] https://circuitdigest.com/article/beginners-guide-for-getting-started-with-3d-printing