diff --git a/book/download_repo.md b/book/download_repo.md
index 4587dd7a09a00fe9830ca9b3d350c9bb5ebe161d..e58648d60f3a6ca07376c680079ebc9ef40f4090 100644
--- a/book/download_repo.md
+++ b/book/download_repo.md
@@ -26,3 +26,21 @@ and then clone the repository. This will download all of the files necessary for
 ```bash
 git clone https://gitlab.pasteur.fr/iah-public/20241008_remote_python_bioimage_analysis_course_day2
 ```
+
+### More about Git
+Git is a version control system. A version control system (VCS) manages and tracks changes to files over time, allowing multiple users to collaborate efficiently on projects. It records a history of changes, supports branching for parallel work, and helps merge or resolve conflicts. It ensures a consistent project state and enables reverting to previous versions when needed. 
+
+We could summarize the key principles of Git as follows: 
+
+- Tracking changes: Git records a history of changes (commits) to a project, making it easy to review, undo, or revert to previous versions.
+
+- Branching and merging: Developers can create branches to work on new features or fixes independently, then merge these changes back into the main project.
+
+- Collaboration: Multiple users can work concurrently, and Git helps resolve conflicts when changes overlap.
+
+- Distributed: Each user has a complete copy of the project history, enabling offline work and decentralization.
+
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+