remark-gfm is a remark plugin that adds support for GitHub Flavored Markdown (GFM) to the remark ecosystem. It enables parsing and rendering of GFM-specific syntax such as tables, tasklists, and strikethrough text, which are not part of standard Markdown. This allows developers to process and transform Markdown content that includes these common GitHub extensions, making it ideal for projects that need to accurately handle GFM-style documents.