In Thunderbird email client, tags are used to organize and group messages manually or through filters. They can be assigned and removed via the context menu, toolbar, or message header, and are case-insensitive. Tags are stored differently depending on whether you use POP or IMAP accounts, and their color is determined by the lowest-numbered tag assigned. The article also discusses differences between tags and labels, interoperability with other email clients, and various add-ons that enhance tag functionality.
Web-based social bookmarking system. Allows multiple users to store, share and tag their favourite links online.
