I've been using Stack Overflow for some time and I thought it was time I started contributing to the Meta site:
I recently noticed that there's a gz with only 140 questions and very little associated information:
.gz is a file format used by the gzip application that compress/decompress files.
This tag seems redundant given that there already exists a much more comprehensive gzip with 2.9k questions.
gzip is the name for the compressed data format used by the eponymous GZip application for compressing and decompressing data.
gzcompress
function, automatic decompression by text editors such as Vim, etc. Both tags also include questions about the file format itself as specified in RFC1950.