What does a user need to do to view the differences between changes in GitLab?

To view the differences between changes in GitLab, using the Changes tab is the most direct and effective approach. The Changes tab is specifically designed to display the alterations made in a particular commit or a merge request, allowing users to see line-by-line modifications, additions, and deletions. This feature is crucial for developers and teams as it provides a clear and concise visual representation of how the codebase has evolved over time.

The other options do not directly facilitate the viewing of changes. The Settings tab pertains to project configurations and user preferences, which do not relate to code changes. The History section could refer to various historical commits, but it does not provide a comparative view of the changes like the Changes tab does. Reviewing Snippets focuses on pieces of reusable code, which is not geared towards showing differences in changes made to files or projects. Thus, opting for the Changes tab ensures that users get the relevant insights needed to understand the modifications in their code effectively.