The Search on Internet plugin enhances Obsidian by adding the ability to search selected text, note titles, and links on external websites directly from within the app. Users can configure custom search options for websites like Google or Wikipedia, or define their own using templates. Searches can be displayed in an embedded iframe within Obsidian or opened in the default browser. The plugin also integrates with the file context menu, enabling quick searches based on note titles or tags. It streamlines research and external lookups, making it easier to gather information without leaving Obsidian.