If you're a 3D artist or designer using Blender, you may need to export your models in a universal format like OBJ for sharing with others or using in other software. Here's a step-by-step guide on how to save your Blender object as an OBJ file:

1. Select the Object: In Blender, select the 3D object you want to save as an OBJ file by clicking on it in the 3D view.

2. Go to File Menu: Once the object is selected, go to the 'File' menu at the top left corner of the screen.

3. Choose Export: In the 'File' menu, scroll down and choose the 'Export' option.

4. Select OBJ Format: After choosing the 'Export' option, select 'Wavefront (.obj)' from the list of available file formats.

5. Set Export Options: In the OBJ export options panel, you can set various parameters such as scale, smoothing, and material options. Adjust these settings as per your requirements.

6. Choose File Name and Location: After setting the export options, choose the file name and location where you want to save the OBJ file on your computer.

7. Click Export: Once you've set the file name and location, click the 'Export OBJ' button to save your Blender object as an OBJ file.

8. Check Your OBJ File: After exporting, go to the location where you saved the OBJ file and open it to ensure that the export was successful.

By following these simple steps, you can easily save your 3D models in Blender as OBJ files for sharing or using in other software. OBJ files are widely supported and can be easily opened in various 3D modeling and rendering programs, making them a popular choice for sharing 3D models across different platforms and software.

Remember to also consider any material or texture files associated with your 3D model, as OBJ files do not include these by default. You may need to manually collect and organize the related files to ensure that your model appears correctly when shared with others.

Now that you know how to save your Blender object as an OBJ file, you can easily collaborate and share your 3D creations with others in a universal format. Happy modeling!