The Multi Tag plugin is a convenient tool for Obsidian users who need to quickly add tags to multiple notes within a folder. With this plugin, you can right-click on a folder and select the option to add a tag to all notes inside it. The plugin will then prompt you to enter a tag, which will be appended to each note in the folder. You can also use Shift+Mouse to select multiple notes and apply tags to them simultaneously. Additionally, you can customize how the tags are added by enabling YAML or inline tagging options in the plugin's settings menu. This plugin is ideal for users who need to organize their notes with specific tags or categories, making it easier to search and retrieve related information.