When working with Git for version control, it is essential to keep the repository clean and organized. One common issue that developers encounter is the inclusion of the 'obj' folder in the repository. The 'obj' folder contains compiled object files that can quickly clutter the repository and increase its size. Fortunately, Git provides a way to ignore the 'obj' folder and prevent it from being tracked. Here's how you can ignore the 'obj' folder in Git:

1. Create a .gitignore file: In the root directory of your Git repository, create a file named '.gitignore' if it does not already exist.

2. Add 'obj/' to .gitignore: Open the '.gitignore' file in a text editor and add the following line: 'obj/'. This will instruct Git to ignore the 'obj' folder and its contents.

3. Commit the .gitignore file: After adding 'obj/' to the .gitignore file, save the changes and commit the file to the repository. This will ensure that Git ignores the 'obj' folder from this point onward.

4. Remove 'obj' folder from the repository: If the 'obj' folder has already been added to the repository, you can remove it by using the following command: 'git rm -r --cached obj/'. This will remove the 'obj' folder from the repository without deleting it from your local file system.

By ignoring the 'obj' folder in Git, you can keep your repository clean and optimized, reducing the size and improving the overall performance. Additionally, it also prevents unnecessary changes and conflicts related to the 'obj' folder, allowing for a smoother collaboration among developers.

In conclusion, ignoring the 'obj' folder in Git is a crucial step in maintaining a well-organized and efficient version control system. By following the simple steps outlined above, you can ensure that the 'obj' folder is excluded from the repository, keeping it tidy and focused on your source code and essential files.