The recover tag is used to mark questions that have something to do with recovering data. By itself, it is ambiguous and useless and must be combined with other, appropriate tags such as software packages and database system tags, operating system tags, programming language and programming language environment tags.
Recovery usually involves some need to regain lost data whether that data is management data such as the management data of a database resulting in database access failing or raw data such as the contents of a database record or a file.
Any post using the [recovery] tag must include additional tags and a write up that helps the reader to know the context of the failure that lead to data loss along with the operating environment at the time of the data loss.
The post should include what was being done at the time of the data loss, any error logs generated, steps taken after the data loss such as recovery procedures executed along with their results, and a description of the actual data lost.
Context information may include: the operating system, the database system, the source code repository package, the programming language being used, the kind of data that was lost, and/or the IDE being used.