Yesterday I posted the following question Please make [storage] and [image-storage] synonyms of [online-storage]. At this time, it received two comments mentioning that online-storage is a meta-tag, so I'm wondering if there any tag in Web Applications that is not about a specific web app or web app feature, besides bookmarklets and browsers features which are directly related to web application like Greasemonkey scripts that is not a meta-tag.
At this time it looks to me that most tags in Web Applications site should use the name of a web application or a prefix to related it to a web application to make it be able to be used alone and make it means the same for different people as it's required by the tags help article but could be exceptions like things that are commonly used by different web apps.
Which are those tags and why they aren't a meta-tag in the context of Web Applications?
Proposal: Add one answer for each of this tags and explain why it's not a meta-tag.