Github LGTM is a Chrome add-on developed by Friday Inc. that enhances the code review experience on GitHub. This free add-on allows users to easily see the review status of pull requests at a glance, making it easier to manage feature branches and integrate changes.

With Github LGTM, users can enjoy several features that enhance the code review process. Firstly, it displays a vote summary on both the pull request list and details pages, providing a quick overview of the review status. This is especially helpful in long-winded discussions and formal team-wide code review setups.

Additionally, the add-on offers the ability to disable the merge button when there aren't enough votes on a pull request or when it is marked as a work in progress (WIP) by adding "WIP" to its title. This ensures that only well-reviewed and finalized changes are merged into the codebase.

Users also have the flexibility to change the number of votes necessary for a merge and customize the keywords used for WIP detection. This allows for adaptation to different team workflows and requirements.

Furthermore, Github LGTM goes a step further by displaying the vote count on the favicon of the pull request details page, providing an even more convenient way to stay informed about the review status.

Overall, Github LGTM is a valuable add-on for anyone involved in code reviews on GitHub. It streamlines the process, improves visibility, and helps ensure high-quality code integration.