When someone assigns you an issue on GitHub, it means:

Responsibility: You are responsible for addressing and resolving the issue. It is now your task to investigate, work on, and ideally, complete the solution.

Acknowledgement: The project maintainer or team trusts your skills and believes you can handle this task effectively.

Priority: The issue becomes part of your work queue. If the issue is part of a project or milestone, it may have deadlines or dependencies.

Collaboration: If others are involved, you might need to coordinate with them, share progress, or ask for clarifications.

Make sure to:

Understand the problem described in the issue. Communicate updates or ask questions in the issue thread. Submit your work as a pull request referencing the issue.