Open Graph tags are snippets of HTML code added to a webpage to control how its content appears when shared on social media platforms like Facebook, LinkedIn, and Twitter. By specifying elements such as the title, description, image, and URL, Open Graph tags ensure that shared links display consistently and attractively, improving engagement and click-through rates. These tags are placed within the <head> section of a webpage and follow the Open Graph protocol developed by Facebook. Proper implementation helps websites manage their social media presence and enhances the user experience when content is shared.