A **tag** is a word or phrase that describes the topic of the question. Tags are a means of connecting experts with questions they will be able to answer by sorting questions into specific, well-defined categories. See [*Help Center* > *Asking*: *What are tags, and how should I use them?*](https://serverfault.com/help/tagging). 

If you see a need for a new tag, consult [*Help Center* > *Privileges* >  *create tags*](https://serverfault.com/help/privileges/create-tags). There is advice there on evaluating if the proposed tag is appropriate to add. Create the tag by adding it to a question. To do this, you need to have the *Create Tags* privilege, which is awarded at 300 reputation on Server Fault. If you do not have this much reputation, post a question on [Meta Server Fault](https://meta.serverfault.com/) asking someone else to create it.