When is it preferable to use the merge command, and when rebase in Git version control system?

The merge command is used when you need to combine two branches while preserving the change history of both branches. It creates a new merge commit that reflects the integration. merge is preferred when transparency of history and preservation of all branches are important.

The rebase command moves changes from one branch onto another, rewriting the commit history. This makes the history more linear and clean, which is convenient for simplifying history before merging into the main branch.

Use merge if you want to keep the full history and are not afraid of branching. Use rebase to make the history more readable and to avoid unnecessary merge commits, especially before publishing changes to the shared branch.

Example:

# merge
git checkout feature
git merge main

# rebase
git checkout feature
git rebase main