3D slicer software is used to prepare 3D models for printing by a 3D printer. It takes the 3D model, usually in the form of an STL file, and slices it into thin layers, generating a set of instructions for the printer to follow.

Here's a simplified overview of the process:

1. The 3D model is imported into the slicer software.

2. The user selects the type of printer and the type of material that will be used for printing.

3. The slicer software analyzes the 3D model and generates a preview of how the final object will look when it is printed.

4. The user can adjust various settings such as the layer height, infill pattern, and support structures (if necessary) to fine-tune the print.

5. The slicer software generates the final set of instructions, known as the G-code, which tells the printer how to move the print head and extrude the material to create each layer of the object.

6. The G-code is saved and transferred to the printer, which then begins the printing process.

3D slicer software is an essential tool for 3D printing, as it translates the 3D model into a form that the printer can understand and execute. There are many different slicer software options available, ranging from open-source options to proprietary software packages.